Patent ID: 8513301
Filing Date: 2013-08-20
Classification: A61K,A61P,C07D

Abstract:
1. A method for preparing the piperphentonamine hydrochloride lyophilized powder for injection, comprising the steps of: weighing the piperphentonamine hydrochloride and the excipient, adding 500 parts of water for injection, raising the temperature up to 60° C., ultrasonic dissolving, degerming and split charging into a glass bottle, decreasing the temperature of the sample chamber to −25° C.-−35° C., then placing the split charged sample into it for pre-freezing for 3-7 hours, increasing the temperature to −20° C.-−10° C. for freeze dehydrating for 15-25 hours, and again increasing the temperature to 20° C.-30° C. for drying for 5-15 hours.