AIDS-057551 AIDS057551 Acetamide, N-[(2E,4Z)-4-[(2,3-dichlorophenyl)methylene]-1-[(Z)-(2,4-dioxo-2H-1-benzopyran-3(4H)-ylidene)methyl]-3-methyl-5-oxo-2-imidazolidinylidene]- NSC658490