((1S,2S,5S,4R,13R)-5-(3a,6a-Dihydro-2H,3H,3aH,6aH-furano[3,2-d]oxolan-2-yl)-2-acetyloxy-4,5-dimethylspiro[bicyclo[4.4.0]decane-10,3'-oxirane]yl)methyl acetate 464-71-1 AIDS-097089 AIDS097089 Clerodin