189308-09-6 Danshenol B Phenanthro(1,2-b)furan-11(2H)-one, 1,6,7,8,9,10-hexahydro-10-hydroxy-1,6,6-trimethyl-10-(2-oxopropyl)-, (1R,10S)- Phenanthro(1,2-b)furan-11(2H)-one, 1,6,7,8,9,10-hexahydro-10-hydroxy-1,6,6-trimethyl-10-(2-oxopropyl)-, (1R-trans)-