2H-2,4a-Ethenonaphtho[2,1-c][1,2]dioxin-7-carboxylic acid, 1,5,6,6a,7,8,9,10,10a,10b-decahydro-12-(1-hydroxy-1-methylethyl)-7,10a-dimethyl-, methyl ester AIDS-138681 AIDS138681 NSC645999