10-Hydroxy-3a,5a-dimethyl-1a,2,3,3a,3b,4,5,5a,7,8,8a,8b,9,10-tetradecahydro-1H,5'H-spiro[cyclopenta[a]cyclopropa[2,3]cyclopenta[1,2-f]naphthalene-6,2'-furan]-5'-one 7247-99-6 AIDS-125134 AIDS125134 NSC63298