Trihydrates of sodium l- and d-2-pyrrolidone-5-carboxylate

C - Chemistry – Metallurgy – 07 – D

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260/324.3

C07D 207/28 (2006.01)

Patent

CA 2000184

A description is given of the new crystalline trihydrates of sodium-L- and -D-2-pyrrolidone-5-carboxylate. These trihydrates can be obtained by preparing an aqueous solution of sodium-L- or -D-2-pyrrolidone-5-carboxylate and matching the temperature and concentration to each other in such a way that the solubility of the respective trihydrate is exceeded.

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