(S)-2-Amino-5-((imino(nitroamino)methyl)amino)-N-(4-nitrophenyl)pantanamide 85697-89-8 L-N(G)-Nitroarginine-p-nitroanilide L-Napna N(G)-Nitroarginine-4-nitroanilide N(omega)-Nitro-L-arginine p-nitroanilide NAPNA Pantanamide, 2-amino-5-((imino(nitroamino)methyl)amino)-N-(4-nitrophenyl)-, (S)-