Dikusar, E. A. et al. published their research in Russian Journal of Organic Chemistry in 2009 | CAS: 20665-85-4

4-Formyl-2-methoxyphenyl isobutyrate (cas: 20665-85-4) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Electric Literature of C12H14O4

Long-chain functionally substituted aromatic Schiff bases derived from cetylamine was written by Dikusar, E. A.;Potkin, V. I.;Kozlov, N. G.. And the article was included in Russian Journal of Organic Chemistry in 2009.Electric Literature of C12H14O4 This article mentions the following:

A series of long-chain functionally substituted aromatic Schiff bases I containing alkoxy and acyloxy groups, as well as carborane fragments, was synthesized by condensation of the corresponding benzaldehydes of the vanillin series with cetylamine. In the experiment, the researchers used many compounds, for example, 4-Formyl-2-methoxyphenyl isobutyrate (cas: 20665-85-4Electric Literature of C12H14O4).

4-Formyl-2-methoxyphenyl isobutyrate (cas: 20665-85-4) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Electric Literature of C12H14O4

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