1,4-Benzodioxin-2-carboxamide, 6-(4-oxo-4-H-1- benzopyran-2-yl)-N-(3-pyridinylmethyl)- 6-(4-Oxo-4H-chromen-2-yl)-N-(3-pyridinylmethyl)-2,3-dihydro-1,4-benzodioxine-2-carboxamide AIDS-131471 AIDS131471 NSC623794