10-Methoxy-8,8-dimethyl-4-(2-phenylethyl)-7,8-dihydro-2H,6H-pyrano[3,2-g]chromen-2-one AIDS-140588 AIDS140588 NSC653003 {2h,6h-Benzo[1,2-b:5,4-b']dipyran-2-one,} 7,8-dihydro-10-meth- oxy-8,8-dimethyl-4-(2-phenylethyl)-