CC(C)=CCC/C(C)=C/CC/C(C)=C/CCC1=CC[C@@H](O)[C@@]2(C(=O)O)CC(=O)N[C@@H]12 (3aR,4R,7aS)-4-hydroxy-2-oxo-7-[(3E,7E)-4,8,12-trimethyltrideca-3,7,11-trienyl]-3,4,5,7a-tetrahydro-1H-indole-3a-carboxylic acid