The molecule is a monocarboxylic acid anion that is the conjugate base of 3,4,5-trimethoxydihydrocinnamic acid, formed by proton loss from the carboxy group. It derives from a propionate. It is a conjugate base of a 3,4,5-trimethoxydihydrocinnamic acid.
3-(3,4,5-trimethoxyphenyl)propanoate