ethyl2-amino-2-oxoacetate-13C15N;Acetic acid, aminooxo-, ethyl ester-13C15N (9CI); Oxamic acid, ethyl ester-13C15N (6CI,7CI,8CI); 2-Amino-2-oxoacetic acid ethyl ester-13C15N; Ethoxalamide-13C15N; Ethyl 2-amino-2-oxoacetate-13C15N; Ethyl oxamate-13C15N; O-Ethyl oxamate-13C15N; Oxalic acid monoethyl ester amide-13C15N; Oxamethane-13C15N;ethyl2-amino-2-oxoacetate-13C15N
