[{"from": "human", "value": "Generate a molecule based on this description. The molecule is a vaccenate(1-) that is the conjugate base of cis-vaccenic acid, arising from deprotonation of the carboxylic acid group. It is a vaccenate(1-) and an octadecenoate. It is a conjugate base of a cis-vaccenic acid."}, {"from": "gpt", "value": "[C][C][C][C][C][C][/C][=C][\\C][C][C][C][C][C][C][C][C][C][=Branch1][C][=O][O-1]"}]