(4bS,5R,7R,10R,10aR)-4b,5,10,10a-Tetrahydroxy-1,1,7-trimethyl-7-vinyl-1,2,3,4,4b,5,6,7,10,10a-decahydro-9H-10,4a-(epoxymethano)phenanthren-9-one AIDS-166619 AIDS166619