the deuterium content of [ 2,3-2h2 ] succinic acid , [ 2-2h2 ] succinic acid ( derived from l- [ 4-2h2 ] glutamic acid by oxidation ) and of the corresponding succinates isolated after incubation with isocitrate lyase was determined by gas chromatography-mass spectroscopy of their dimethylester under nh4+ chemical ionization .
C0075429
succinic acid
C0038617
succinates