Synonyms: L-Ornithine, N5-[imino(nitroamino)methyl]-, phenylmethyl ester, mono(4-methylbenzenesulfonate) (9CI);Ornithine, N5-(nitroamidino)-, benzyl ester, mono-p-toluenesulfonate, L- (8CI); Ornithine, N5-(nitroamidino)-, benzyl ester, p-toluenesulfonate (7CI);Benzyl Nω-nitro-L-argininate p-toluenesulfonate;