hexadec-9-enoate 9-hexadecenoate hexadec-9-enoate A long-chain unsaturated fatty acid anion that is the conjugate base of hexadec-9-enoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. 253.21730 [H]C(CCCCCC)=C([H])CCCCCCCC([O-])=O chebi_ontology 253.40030 C16H29O2 -1 hexadec-9-enoate(1-) 9-hexadecenoate(1-) SECPZKHBENQXJG-UHFFFAOYSA-M InChI=1S/C16H30O2/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16(17)18/h7-8H,2-6,9-15H2,1H3,(H,17,18)/p-1 CHEBI:71449 hexadec-9-enoic acid hexadecenoate