coumaric acid 0 164.04734 164.158 cas:25429-38-3 chebi_ontology A monohydroxycinnamic acid that is prop-2-enoic acid substituted by a hydroxyphenyl group at position 3. 3-(hydroxyphenyl)-2-propenoic acid CHEBI:23401 3-(hydroxyphenyl)prop-2-enoic acid 3-(hydroxyphenyl)prop-2-enoic acid hydroxycinnamic acid C9H8O3 hydroxycinnamic acid