Butanedioic acid,2,3-dihydroxy- (2R,3R)-ammonium salt (1:?)

butanedioic acid,2,3-dihydroxy- (2r,3r)-, ammonium salt (1:) ; butanedioic acid,2,3-dihydroxy- (2r,3r)-, ammonium salt (1:?) ; tartaric acid, ammonium salt (8ci) ; ammonium [r-(r*,r*)] ; butanedioic acid,2,3-dihydroxy- [r-(r*,r*)]-, ammonium salt ; butanedioicacid, 2,3-dihydroxy- (2r,3r)-, ammonium salt (9ci) ; ammonium tartrate ; ammonium [r-(r*,r*)]-tartrate ; ammonium tartrate [(nh3)x(c4h9o4)] ; dl-choline bitartrate