4OH-Coumarin deriv. AIDS-006498 AIDS006498 N-[(1,1-Dimethylethoxy)carbonyl]-N-[3-[(4-hydroxy-2-oxo-7-methoxy-2H-1-benzopyran-3-yl)cyclopropylmethylene]phenyl]alaninanamide Phenprocoumon b.AlaNH deriv. U97410 analog