Freeze-dried preparation of n[o-(p-pivaloyloxybenzenasulfonylamino) benzoyl] glycine monosodium salt tetrahydrate and process for producing same

摘要

A method for the preparation of a freeze-dried product of N-[o-(p-pivaloyloxybenzenesulfonylamino)benzoyl]glycine monosodium salt tetra-hydrate dissolved in a mixed solvent of water and ethanol, and the freeze-dried product obtained by the method. According to the present invention, N-[o-(p-pivaloyloxybenzenesulfonylamino)benzoyl]glycine monosodium salt tetra-hydrate is dissolved in a small amount of a mixed solvent of water and ethanol, and therefore it is possible to manufacture high-dosage product by freeze-drying.