cinnamate cis-cinnamate (2Z)-3-phenylacrylate (2Z)-3-phenylprop-2-enoate 147.045 147.15068 C9H7O2 CHEBI:35700 InChI=1S/C9H8O2/c10-9(11)7-6-8-4-2-1-3-5-8/h1-7H,(H,10,11)/p-1/b7-6- WBYWAXJHAXSJNI-SREVYHEPSA-M [O-]C(=O)\C=C/c1ccccc1 chebi_ontology