Patent ID: 9446091
Filing Date: 2016-09-20
CPC Classification: A61K,A61P,C07K

Claim Text:
1. A preparation method for a composition comprising: a compound of formula 1 or salts thereof; one or more organic solvents resulting from the preparation of the compound of formula 1 or salts thereof; and inorganic salts, wherein, in the one or more organic solvents, each organic solvent is present at a weight percentage of not more than 0.5%; the salts of the compound of formula 1 are acetate; and the inorganic salts are present at a weight percentage of not more than 0.5%, wherein the method includes the following steps: a. vacuum-drying raw material comprising the compound of formula 1 or salts thereof with a water system together, b. removing the water system, and then continuing vacuum-drying of the raw material comprising the compound of formula 1 or salts thereof, thereby obtaining the composition.