4,9-Diethyl-8,10-dihydroxy-8,9-dimethyl-6-(3-methyl-2-butenyl)-8,9,10,10c-tetrahydro-5aH-furo[4,3,2-de]pyrano[2,3-h]chromen-2(4H)-one AIDS-152350 AIDS152350 NSC696132