Sigma-Aldrich
Gly-Pro-Arg-Pro amide
Gly-Pro-Arg-Pro 酰胺
Gold
L-Glutamic acid γ-(p-nitroanilide) hydrochloride
L-谷氨酸 γ-(对硝基苯胺) 盐酸盐
L-Serine benzyl ester hydrochloride
Lead
Iron
Molybdenum