10-Hydroxy-2,4a,6a,9,9,12a,14a-heptamethyl-1,2,3,4,4a,5,6,6a,7,8,8a,9,10,11,12,12a,13,14,14a,14b-icosahydro-2-picenecarboxylic acid AIDS-160964 AIDS160964 Bryonolic acid NSC660308