1 995 4-methyl-pentanoic acid {1-[4-guanidino-1-(thiazole-2-carbonyl)-butylcarbamoyl]-2-methyl-propyl}-amide 1.000 2 682 N~2~-(aminocarbonyl)-N~1~-{4-{[amino(imino)methyl]amino}-1-[hydroxy(1,3-thiazol-2-yl)methyl]butyl}valinamide 0.806