3-(4-Chloro-1,3-cyclohexadien-1-yl)-2-(2-chloro-5-(hydroxy(oxido)amino)phenyl)-5-(1-(2-oxo-2H-chromen-3-yl)ethylidene)-3,5-dihydro-4H-imidazol-4-one AIDS-137967 AIDS137967 NSC643737