hydroxycinnamic acid caffeic acid 0 180.04226 180.159 reaxys:2210883 pubmed:20542693 3-(3,4-dihydroxyphenyl)prop-2-enoic acid lincs.smallmolecule:LSM-5272 A hydroxycinnamic acid that is cinnamic acid in which the phenyl ring is substituted by hydroxy groups at positions 3 and 4. It exists in <i>cis</i> and <i>trans</i> forms; the latter is the more common. CHEBI:36281 pubmed:15778121 pubmed:18061431 [H]C(=Cc1ccc(O)c(O)c1)C(=O)O pubmed:18482095 3-(3,4-dihydroxyphenyl)prop-2-enoic acid InChI=1S/C9H8O4/c10-7-3-1-6(5-8(7)11)2-4-9(12)13/h1-5,10-11H,(H,12,13) kegg.compound:C01481 hmdb:HMDB0001964 QAIPRVGONGVQAS-UHFFFAOYSA-N pubmed:11373473 chebi_ontology pubmed:8340025 C9H8O4 pubmed:18314336