CAS: 331-39-5 Molecular Formula: C9H8O4 Molecular Weight (g/mol): 180.159 MDL Number: MFCD00004392 InChI Key: QAIPRVGONGVQAS-DUXPYHPUSA-N Synonym: caffeic acid,3,4-dihydroxycinnamic acid,3-3,4-dihydroxyphenyl acrylic acid,trans-caffeate,3,4-dihydroxy-trans-cinnamate,2e-3-3,4-dihydroxyphenyl prop-2-enoic acid,3,4-dihydroxybenzeneacrylic acid,e-3-3,4-dihydroxyphenyl acrylic acid,trans-caffeic acid,3-3,4-dihydroxyphenyl propenoic acid PubChem CID: 689043 ChEBI: CHEBI:16433 IUPAC Name: (E)-3-(3,4-dihydroxyphenyl)prop-2-enoic acid SMILES: C1=CC(=C(C=C1C=CC(=O)O)O)O