COC(=O)/C1=C\C(=O)[C@H](C(C)C)CC(=O)[C@H](C)CCC[C@H](C)CC(=O)C1	methyl (1Z,4S,7R,11S)-7,11-dimethyl-3,6,13-trioxo-4-propan-2-ylcyclotetradecene-1-carboxylate