3-[1-(4-Hydroxy-2-oxo-2H-1-benzopyran-3-yl)propyl]-N-[2-methyl-1-[[(2-pyridinylmethyl)amino]carbonyl]butyl]benzamide 4OH Coumarin deriv. AIDS-028331 AIDS028331 Phenprocoumon, Pyrid-CH2NHCO deriv.