InChI=1/C13H18N4O4/c1-9(12(19)17-14)16-11(18)7-15-13(20)21-8-10-5-3-2-4-6-10/h2-6,9H,7-8,14H2,1H3,(H,15,20)(H,16,18)(H,17,19 benzyl {2-[(2-hydrazino-1-methyl-2-oxoethyl)amino]-2-oxoethyl}carbamate (non-preferred name) glycinamide, prolylleucyl-