3-diethoxyphosphoryl-6-hydroxychromen-2-one 3-diethoxyphosphoryl-6-hydroxy-chromen-2-one 3-diethoxyphosphoryl-6-hydroxy-2-chromenone 3-diethoxyphosphoryl-6-hydroxy-coumarin NCI60_021089 3-Diethylphosphono-6-hydroxycoumarin AIDS-142681 AIDS142681 Diethyl 6-hydroxy-2-oxo-2H-chromen-3-ylphosphonate NSC660150