2,8-Epoxy-6,4-(epoxymethano)-1H,8H-benzofuro[2,3-j][2]benzopyran-2,7b,11a(3H,7aH)-triol, 15-(3-furanyl)-4,4a,5,6,9-pentahydro-4,9,9,11-tetramethyl-6-(1-methylethyl)-, 7b-acetate AIDS-149263 AIDS149263 NSC683482