(R)-2,3,4,4a-Tetrahydro-5,8, 10-trihydroxy-6-methoxy-1,1, 4a-trimethyl-7-(1-methylethyl)-9(1H)-phenanthrenone 6,11,14-Trihydroxy-12-methoxyabieta-5,8,11,13-tetraen-7-one AIDS-139221 AIDS139221 Coleon U 12-methyl ether NSC647732