cinnamates 3,4,5-trimethoxycinnamate 237.076 237.22860 3,4,5-trimethoxycinnamic acid anion 3-(3,4,5-trimethoxyphenyl)acrylate C12H13O5 CHEBI:58949 Conjugate base of 3,4,5-trimethoxycinnamic acid. InChI=1S/C12H14O5/c1-15-9-6-8(4-5-11(13)14)7-10(16-2)12(9)17-3/h4-7H,1-3H3,(H,13,14)/p-1 YTFVRYKNXDADBI-UHFFFAOYSA-M [H]C(=Cc1cc(OC)c(OC)c(OC)c1)C([O-])=O chebi_ontology