(2Z)-N-[5-(N-{5-[N-(2-amidinoethyl)carbamoyl]-1-methylpyrrol-3-yl}carbamoyl)-1-methylpyrrol-3-yl]-N'-[5-(N-{5-[N-(2-amidinoethyl)carbamoyl]-1-methylpyrrol-3-yl}carbamoyl)-1-methylpyrrol-3-yl]but-2-ene-1,4-diamide AIDS-004744 AIDS004744 NSC634557