41653-83-2 Azuleno(4,5-b)furan-2(3H)-one, 3a,4,5,6,6a,7,9a,9b-octahydro-4,6a-dihydroxy-9-methyl-3,6-bis(methylene)-, (3aR-(3aalpha,4alpha,6aalpha,9aalpha,9bbeta))- Rupicolin B