Methamphetamine exists as two enantiomers, dextrorotary and levorotary.
甲基苯丙胺以右旋和左旋两种对映体形式存在。
2
Dextrorotary ammonium tartrate can be prepared from by product tartar produced in grape wine factory.
酒石酸氢铵和氨水反应并经脱色、脱水可制得最终产品右旋酒石酸铵。
3
Ammonium bitartrate is filtrated and washed with water to remove Cl -, and then reacted with ammonia to give the final product dextrorotary ammonium tartrate.