摘要:
The present invention provides a process for the preparation of meropenem trihydrate in high purity and high yield, through using a dry methanol solvate of meropenem. The process of the present invention can remarkably reduce the amount of residual solvents in the resulting product, thereby being able to obtain meropenem trihydrate in high purity.
摘要:
The present invention relates to a method for selectively crystallizing Z isomer of iopromide of formula (I) comprising a) dissolving a crude iopromide comprising a mixture of E and Z isomers or a concentrate thereof in an alcohol, and b) heating the resulting alcohol solution to obtain crystalline of Z isomer of iopromide; and a method for preparing a composition comprising the crystalline Z isomer of iopromide.