4-dimethylaminomethyl-1-phenyl-pyrazolidin-3-one 、
草酸 在
乙醇 作用下,
以
丙酮 为溶剂,
以to give colourless crystals of 4-dimethylaminomethyl-1-phenylpyrazolidin-3-one hydrogen oxalate (73% melting point 128°-9° C)的产率得到4-Dimethylaminomethyl-1-phenylpyrazolidin-3-on-monooxalat