26909-34-2 Rugulovasine B Spiro(benz(cd)indole-5(1H),2'(5'H)-furan)-5'-one, 3,4-dihydro-4'-methyl-4-(methylamino)-, (2'R,4R)-rel- Spiro(benz(cd)indole-5(1H),2'(5'H)-furan)-5'-one, 3,4-dihydro-4'-methyl-4-(methylamino)-, trans-(+-)-