COC(=O)C(=C\CO)/C=C(C)/C=C/C=C/C=C(\C)C(=O)C1CC(=O)NC1=O	methyl (2Z,3E,5E,7E,9E)-11-(2,5-dioxopyrrolidin-3-yl)-2-(2-hydroxyethylidene)-4,10-dimethyl-11-oxoundeca-3,5,7,9-tetraenoate