59906-27-3 Ethanimidic acid, 2,2'-((2,3-dihydroxy-1,4-dioxo-1,4-butanediyl)diimino)bis-, dimethyl ester, dihydrochloride, (R-(R*,R*))- N,N'-Bis(carboximidomethyl)tartaramide dimethyl ester