170591-45-4 2H-Pyrrol-2-one, 3-((2-(1,3-dimethyl-1,3-pentadienyl)-1,2,4a,5,6,7,8,8a-octahydro-3,4a,6-trimethyl-1-naphthalenyl)carbonyl)-1,5-dihydro-5-hydroxy-5-(phenylmethyl)- Oteromycin