(6R,7aR,7bR,10R,10aS,10bR,10cR)-10-[(1R)-1-hydroxyethyl]-6-methyl-1,2,3,6,7,7a,7b,10,10a,10b-decahydro-9H-4,10c-propanofuro[3',2':2,3]indeno[7,1-bc]azepin-9-one