2-Amino-2-deoxy-D-gluconic acid 3646-68-2 AI3-51894 D-Gluconic acid, 2-amino-2-deoxy- D-Glucosamic acid D-Glucosaminic acid EINECS 222-879-1 Gluconic acid, 2-amino-2-deoxy-, D- Glucosaminic acid NSC 37779 NSC 404265