Tag: M.W=250-300

Ross, Justine Abella; Komoda, Kellie; Pal, Sumanta; Dickter, Jana; Salgia, Ravi; Dadwal, Sanjeet published the artcile< Infectious complications of immune checkpoint inhibitors in solid organ malignancies>, Application of C19H34O2, the main research area is solid organ malignancy immune checkpoint inhibitor pembrolizumab; checkpoint blockade; immunotherapy; infection; melanoma; nonsmall-cell lung cancer; renal cell carcinoma.

Background : Immune checkpoint inhibitors (ICIs) are targeted cancer therapies regarded to have less toxicity than chemotherapy. Immune-related adverse events (irAEs) of ICIs are well described in the literature but limited data exist on their infectious complications. The objective is to describe the spectrum and risk factors for developing serious infections in patients receiving ICIs. Methods : Retrospective review of patients with melanoma, renal cell carcinoma, or nonsmall-cell lung cancer on nivolumab, pembrolizumab, and/or ipilimumab from Jan. 1, 2017 to Nov. 30, 2017. Exclusion: receipt of less than two ICI doses or history of other malignancy. Characteristics: age, sex, prior chemotherapy, steroid use, and temozolomide or infliximab use. Data identified from microbiol., radiog., serol., or physician note documentation. Serious infection is defined as infections requiring hospitalization and/or IV antibiotics from initiation of ICI until the end of the study period. Results : One hundred and eleven pts received ICIs. Suspected or confirmed bacterial infections occurred in 24(27/111) with 8(9/111) confirmed bacterial cultures. The overall serious infection rate was 14(16/111) with 25(4/16) confirmed bacterial cultures. Suspected or confirmed infection sites: genitourinary 20(22/111), pneumonia 5(7/111), skin/soft tissue 7(8/111). Noninfectious pneumonitis (NIP) occurred in 5(5/111). No association regarding the risk of infection between the type of malignancy and ICI used. Steroid use was the only risk factor significantly associated with serious infection: 12/16 (75) on steroids vs. 27/95 (28.4) without steroid use (p = 0.0003). Conclusion : The rate of serious infection with ICI was higher in our study compared with previous reports of pts treated with melanoma. Infectious complications are encountered with ICIs and correlate with steroid use.

Cancer Medicine published new progress about Antibiotics. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Application of C19H34O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Khare, Shilpi; Nagle, Advait S.; Biggart, Agnes; Lai, Yin H.; Liang, Fang; Davis, Lauren C.; Barnes, S. Whitney; Mathison, Casey J. N.; Myburgh, Elmarie; Gao, Mu-Yun; Gillespie, J. Robert; Liu, Xianzhong; Tan, Jocelyn L.; Stinson, Monique; Rivera, Ianne C.; Ballard, Jaime; Yeh, Vince; Groessl, Todd; Federe, Glenn; Koh, Hazel X. Y.; Venable, John D.; Bursulaya, Badry; Shapiro, Michael; Mishra, Pranab K.; Spraggon, Glen; Brock, Ansgar; Mottram, Jeremy C.; Buckner, Frederick S.; Rao, Srinivasa P. S.; Wen, Ben G.; Walker, John R.; Tuntland, Tove; Molteni, Valentina; Glynne, Richard J.; Supek, Frantisek published the artcile< Proteasome inhibition for treatment of leishmaniasis, Chagas disease and sleeping sickness>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is kinetoplastid proteasome target leishmaniasis Chagas sleeping sickness.

Chagas disease, leishmaniasis and sleeping sickness affect 20 million people worldwide and lead to more than 50,000 deaths annually. The diseases are caused by infection with the kinetoplastid parasites Trypanosoma cruzi, Leishmania spp. and Trypanosoma brucei spp., resp. These parasites have similar biol. and genomic sequence, suggesting that all three diseases could be cured with drugs that modulate the activity of a conserved parasite target. However, no such mol. targets or broad spectrum drugs have been identified to date. Here we describe a selective inhibitor of the kinetoplastid proteasome (GNF6702) with unprecedented in vivo efficacy, which cleared parasites from mice in all three models of infection. GNF6702 inhibits the kinetoplastid proteasome through a non-competitive mechanism, does not inhibit the mammalian proteasome or growth of mammalian cells, and is well-tolerated in mice. Our data provide genetic and chem. validation of the parasite proteasome as a promising therapeutic target for treatment of kinetoplastid infections, and underscore the possibility of developing a single class of drugs for these neglected diseases.

Nature (London, United Kingdom) published new progress about Chagas disease. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Zhu, Xing-Li; Xu, Jin-Hui; Cheng, Dao-Juan; Zhao, Li-Jiao; Liu, Xin-Yuan; Tan, Bin published the artcile< In Situ Generation of Electrophilic Trifluoromethylthio Reagents for Enantioselective Trifluoromethylthiolation of Oxindoles>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is trifluoromethylthiolation enantioselective oxindole trifluoromethylthiosilver.

An organocatalytic asym. trifluoromethylthiolation reaction via in situ generation of active electrophilic trifluoromethylthio species involving trichloroisocyanuric acid and AgSCF3 as a practical and easily handled electrophilic SCF3 source for CSP3-SCF3 bond formation was developed. Reactions with this one-pot version strategy occurred in good yields and excellent stereoselectivities to access enantiopure oxindoles bearing a SCF3-substituted quaternary chiral center. E.g., in presence of trichloroisocyanuric acid, AgSCF3, and catalyst (DHQD)2Pyr, trifluoromethylthiolation of oxindole derivative (I) gave 78% II (90 °C). The straightforward process described here makes use of simple starting materials and proceeds under mild conditions, which will be useful in medicinal chem. and diversity-oriented syntheses.

Organic Letters published new progress about Enantioselective synthesis. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Patberg, Marius; Isaak, Andreas; Fuesser, Friederike; Ortiz Zacarias, Natalia V.; Vinnenberg, Laura; Schulte, Janine; Michetti, Lucia; Grey, Lucie; van der Horst, Cas; Hundehege, Petra; Koch, Oliver; Heitman, Laura H.; Budde, Thomas; Junker, Anna published the artcile< Piperazine squaric acid diamides, a novel class of allosteric P2X7 receptor antagonists>, Quality Control of 112-63-0, the main research area is liver microsome piperazine P2X7 receptor physicochem property; Allosteric; Antagonists; P2X; P2X7 receptor; Squaric acid.

The P2X7 receptor (P2X7R) stands out among the purinergic receptors due to its strong involvement in the regulation of tumor growth and metastasis formation as well as in innate immune responses and afferent signal transmission. Numerous studies have pointed out the beneficial effects of P2X7R antagonism for the treatment of a variety of cancer types, inflammatory diseases, and chronic pain. Herein we describe the development of novel P2X7R antagonists, incorporating piperazine squaric diamides as a central element. Besides improving the antagonists potency from pIC50 values of 5.7-7.6, ADME properties (logD7.4 value, plasma protein binding, in vitro metabolic stability) of the generated compounds were investigated and optimized to provide novel P2X7R antagonists with drug-like properties. Furthermore, docking studies revealed the antagonists binding to the allosteric binding pocket in two distinct binding poses, depending on the substitution of the central piperazine moiety.

European Journal of Medicinal Chemistry published new progress about Diamides Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Quality Control of 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Lipshutz, Bruce H.; Noson, Kevin; Chrisman, Will; Lower, Asher published the artcile< Asymmetric Hydrosilylation of Aryl Ketones Catalyzed by Copper Hydride Complexed by Nonracemic Biphenyl Bis-phosphine Ligands>, Electric Literature of 112-63-0, the main research area is copper hydride diphosphine catalyst asym hydrosilylation reduction aromatic ketone; ketone aromatic asym hydrosilylation reduction chiral benzyl alc preparation; silane hydrosilane reduction aromatic ketone asym copper diphosphine catalyst.

Copper hydride is an extremely reactive catalyst capable of effecting asym. hydrosilylations of aromatic ketones at temperatures between -50 and -78°, when complexed by chiral diphosphines of the BIPHEP or the SEGPHOS series. Inexpensive silanes serve as stoichiometric sources of hydride. Substrate-to-ligand ratios exceeding 100,000:1 were achieved. The level of induction is usually in the >90% ee category. The nature of the reagent was investigated using spectroscopic and chem. means, although its exact structure remains unclear.

Journal of the American Chemical Society published new progress about Aralkyl alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Electric Literature of 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Ledzion, Ewa; Rybinska, Krystyna; Postupolski, Jacek; Kurpinska-Jaworska, Jolanta; Szczesna, Malgorzata published the artcile< Studies and safety evaluation of aflatoxins in herbal plants>, Quality Control of 112-63-0, the main research area is medicinal plant aflatoxin contamination Poland.

The aflatoxin (AF; B1, B2, G1, G2) levels in medicinal herbal plants were determined by HPLC with post-column bromination derivatization with pyridinium hydrobromide perbromide (PBPB). Com. herbal plant samples (n = 519) originating mainly from Eastern Poland were studied in 2006-2010. The aqueous methanol herbal extracts clean-up was done with immunoaffinity columns. No sample had aflatoxin levels above the HPLC method detection limits (B1 0.2 μg/kg; B2 0.03 μg/kg; G1 0.3 μg/kg; G2 0.03 μg/kg). The studied herbal plants were prepared with good manufacturing practices during raw materials drying and storage and can be considered safe.

Roczniki Panstwowego Zakladu Higieny published new progress about Food contamination. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Quality Control of 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

He, Dongmei; Wang, Peng; Liao, Fengyun; Yu, Lingling; Gan, Bing published the artcile< Cell membrane-coated biomimetic magnetic nanoparticles for the bio-specific extraction of components from Gualou Guizhi decoction exhibiting activities against oxygen-glucose deprivation/reperfusion injury>, Synthetic Route of 112-63-0, the main research area is Gualou Guizhi decoction oxygen glucose deprivation reperfusion injury; biomimetic magnetic nanoparticles component cell membrane; Cell membrane-coated magnetic beads; Gua-Lou-Gui-Zhi-decoction; Hypoxia-inducible factor-1α; Mass spectrometry; Oxygen-glucose deprivation/reperfusion injury; Stroke.

Gua-Lou-Gui-Zhi decoction (GLGZD) is a classical multiherb traditional Chinese medicine formula that has ameliorative effects on oxygen-glucose deprivation/reperfusion (OGD/R) injury and has been applied for the treatment of stroke in clin. practice; however, its active ingredients remain unknown. The aim of this study was to develop an effective method for screening for components of GLGZD with potential therapeutic activity against OGD/R injury. Brain microvascular endothelial cell membrane-coated magnetic beads (CMs@rBMECs-MBs) were incubated with the GLGZD extract; the bound material was eluted and the constituents were identified using solid phase extraction and ultra-performance liquid chromatog.-Orbitrap Fusion Tribrid mass spectrometry (UPLC-Orbitrap Fusion Tribrid MS). The biol. activities of the identified GLGZD components were analyzed using OGD/R-exposed brain endothelial cells. Seven compounds bound to the CMs@rBMECs-MBs were identified as gallic acid, paeoniflorin, liquiritigenin, isoliquiritigenin, liquiritin, isoliquiritin, and formononetin. Among them, six (except formononetin) protected brain endothelial cells against OGD/R injury in a concentration-dependent manner (20-120 μM; P < 0.01-0.05) and downregulated the expression of hypoxia-inducible factor-1α (P < 0.01) involved in the pathogenic mechanisms triggered by stroke. Our findings suggest that the screening of bioactive compounds using cell membrane-coated magnetic beads combined with solid phase extraction and UPLC-Orbitrap Fusion Tribrid MS is an effective method for the bio-specific extraction and identification of ingredients responsible for the therapeutic activity of traditional Chinese medicines. Journal of Pharmaceutical and Biomedical Analysis published new progress about Brain. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Synthetic Route of 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Haas, Ronja; Murat, Michael; Weiss, Manuel; Janek, Juergen; Natan, Amir; Schroeder, Daniel published the artcile< Understanding transport of atmospheric gases in liquid electrolytes for lithium-air batteries>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is atm gas transport liquid electrolyte lithium air battery.

In metal-air batteries, carbon dioxide (CO2) and nitrogen (N2) are, apart from oxygen (O2), also present as dissolved species in the liquid electrolyte. These dissolved gases can strongly influence the battery performance, as they affect the discharge mechanism and the stability of the lithium metal anode. Therefore, their solubility and diffusivity are important parameters, that are rarely considered in the development of electrolytes for metal-air batteries. Addnl., the diffusion coefficients are calculated through mol. dynamics simulations. The results agree well with the exptl. data. Furthermore, the influence of solvent parameters, such as surface tension and viscosity, on the solubility and the diffusivity as well as the impact of the addition of LiTFSI as conducting salt are investigated. The reported data will help to assess the impact of dissolved gases on the cell chem. of nonaqueous lithium-air batteries, especially on the solid electrolyte interphase (SEI) at the lithium anode, and to predict diffusivity and gas solubility in other electrolytes.

Journal of the Electrochemical Society published new progress about Battery anodes. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Liotta, Frank J. Jr.; Van Duyne, Gregory; Carpenter, Barry K. published the artcile< Structures and rearrangement mechanisms for some bicyclo[6.1.0]nona-2,4,6-triene complexes of chromium, molybdenum, and tungsten>, Synthetic Route of 112-63-0, the main research area is crystal structure bicyclononatrienemolybdenum; mol structure bicyclononatrienemolybdenum; molybdenum bicyclononatriene structure; chromium bicyclononatriene structure; tungsten bicyclononatriene structure; rearrangement bicyclononatrienemolybdenum.

The structures of (bicyclo[6.1.0]nona-2,4,6-triene)tricarbonylmolybdenum and (endo-9-bromobicyclo[6.1.0]nona-2,4,6-triene)tricarbonylmolybdenum were investigated by x-ray crystallog. Both are shown to have geometries in which the cyclopropane ring is syn to the metal. In the 9-bromo complex only two of the three C:C bonds are coordinated to the metal; the third coordination site is occupied by the halogen. The mechanism of thermal rearrangement of (bicyclo[6.1.0]nona-2,4,6-triene)tricarbonylmolybdenum to (bicyclo[4.2.1]nona-2,4,7-triene)tricarbonylmolybdenum was investigated by deuterium-labeling and kinetic studies. A new, degenerate rearrangement of the starting complex was discovered in the course of this investigation. Similar processes are shown to occur for the corresponding chromium and tungsten complexes. Both types of rearrangement are sigmatropic processes in which the metal does not directly participate in cleavage of the C-C bond.

Organometallics published new progress about Crystal structure. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Synthetic Route of 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Pathak, Rahul; Hendrickson, Tamara L.; Imperiali, Barbara published the artcile< Sulfhydryl Modification of the Yeast Wbp1p Inhibits Oligosaccharyl Transferase Activity>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is oligosaccharyltransferase Wbp1p protein dolichylpyrophosphoryl diacetylchitobiose cysteine.

Chem. labeling of the multimeric Saccharomyces cerevisiae oligosaccharyl transferase indicates that the 48 kDa Wbp1p subunit is an integral component of the catalytically active enzyme. The enzyme was purified following chromatog. on Con A agarose, heparin agarose, Q-Sepharose, and hydroxyapatite media. The enzyme activity copurified with a tetrameric complex of polypeptide subunits. Two of the subunits have been identified as the yeast proteins Wbp1p and Swp1p by amino-terminal residue sequencing. A third subunit was identified as a variably glycosylated polypeptide near 64 kDa; preliminary amino acid sequencing showed no identity to known yeast proteins. Modification of a cysteine residue by the reagent Me methanethiolsulfonate (MMTS) caused time-dependent and concentration-dependent inactivation of the enzyme. To identify the modified subunit of the transferase complex, the labeled reagent S-[(N-biotinoylamino)ethyl] methanethiolsulfonate (BMTS) was synthesized. Like MMTS, BMTS inactivated the oligosaccharyl transferase in a time-dependent manner. Addnl., incubation with the substrate (dolichylpyrophosphoryl)-N,N’-diacetylchitobiose [Dol-PP(GlcNAc)2] protected the enzyme from BMTS inactivation. When the purified enzyme complex was incubated with BMTS, Wbp1p alone was specifically labeled, thereby associating this subunit with catalysis and the binding of the dolichylpyrophosphoryl oligosaccharide substrate in the transferase reaction.

Biochemistry published new progress about Enzyme functional sites. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics