67953-08-6 EINECS 267-944-5 L-2-Amino-4'-nitroglutaranilic acid hydrochloride L-Glutamine, N-(4-nitrophenyl)-, monohydrochloride L-Glutamyl-p-nitroanilide, hydrochloride N-(4-Nitrophenyl)-L-glutamine monohydrochloride