1 DP3 N-{(4s)-4-amino-5-[(2-aminoethyl)amino]pentyl}-N'-nitroguanidine 1.000 2 3HX (4s)-N-{4-amino-5-[(2-aminoethyl)(hydroxyamino]-pentyl}-N'-nitroguanidine 0.944 3 DP1 L-N(omega)-nitroarginine-2,4-L-diaminobutyric amide 0.773