EPIROSMANOL

6β,20-Epoxy-7β,11,12-trihydroxyabieta-8,11,13-triene-20-one

(4aR)-1,3,4,9,10,10aα-Hexahydro-5,6,9β-trihydroxy-1,1-dimethyl-7-(1-methylethyl)-2H-10β,4aβ-(epoxymethano)phenanthren-12-one