Anhydrous crystal of bata-lactam compound and method for preparation thereof
申请人:Shimabayashi Akihiro
公开号:US20090264642A1
公开(公告)日:2009-10-22
The present invention provides anhydrous crystals of β-lactam compound represented by the formula:
The β-lactam compound of the invention is produced by heating an aqueous solution of a salt of the β-lactam compound and adjusting the pH of the aqueous solution to 3 or lower. The β-lactam compound has excellent storage stability.