53478-35-6 DL-Ornithine, N(sup 5)-(2-mercaptoethyl)-, hydrochloride, hydrate (2:4:1) DL-Ornithine, N5-(2-mercaptoethyl)-, dihydrochloride N(sup 5)-(2-Mercaptoethyl)-DL-ornithine hydrochloride hydrate (2:4:1) N(sup 5)-(2-Mercaptoethyl)ornithine dihydrochloride hydrate