... Water (2 vol.) was added to the residue to dissolve piperazine dihydrochloride and the insoluble product ... boiled off and the residual solid crystallised from aqueous ethanol to yield the product (14 g.), mp ... 22.15 8.) in pyridine (50 ml.) was stirred and treated with p-toluoyl chloride ...
![2-([(4-氟苯基)磺酰基]氨基)丙酸结构式](https://image.chemsrc.com/caspic/077/780-97-2.png)