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|1. (WO2017036408) S-(-)-1-PROPYL-2',6'-AMINOXYLENEFORMYLPIPERIDINE CRYSTAL AND SUSTAINED RELEASE PREPARATION THEREOF|
|Applicants:||SICHUAN HAISCO PHARMACEUTICAL CO., LTD.
|Title:||S-(-)-1-PROPYL-2',6'-AMINOXYLENEFORMYLPIPERIDINE CRYSTAL AND SUSTAINED RELEASE PREPARATION THEREOF|
Provided are a long-effective amide local anesthetic: S-(-)-1-propyl-2',6'-aminoxyleneformylpiperidine crystal, a sustained release preparation thereof, and their preparation method. Compared with an existing hydrochloride preparation, the preparation made from the crystal has a particularly good property of continuously and slowly releasing drug and maintaining an effective blood drug concentration, and shows an excellent long-term local analgesic effect.