[{"from": "human", "value": "Describe this molecule. [C][Branch2][Ring1][Ring2][C][C][C][/C][=C][\\C][C][C][Branch1][Ring2][O][Ring1][Ring1][C][C][C][C][C][O][C][C][C][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is an octadecanoid anion that is the conjugate base of 18-hydroxy-12,13-epoxy-(9Z)-octadecenoic acid arising from deprotonation of the carboxylic acid function; major species at pH 7.3 It is an octadecanoid anion, an omega-hydroxy-long-chain fatty acid anion and an epoxy fatty acid anion. It is functionally related to a vernolate. It is a conjugate base of a 12,13-epoxy-18-hydroxy-(9Z)-octadecenoic acid."}]