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宋小琳:
Azithromycin dihydrate is a crystalline form of azithromycin, with the molecular formula C38H72N2O12 · 2H2O. It is a white crystalline powder that can be obtained from azithromycin raw materials through a crystallization process. Azithromycin dihydrate is a broad-spectrum antibiotic commonly used to treat various bacterial infections, such as respiratory infections and skin infections.

宋小琳:
Azithromycin amine is an amine derivative of azithromycin, with the molecular formula C38H74N2O13. It is a colorless or white crystalline powder that can be obtained from azithromycin raw materials through amination reaction. Azithromycin is also a broad-spectrum antibiotic with antibacterial activity similar to azithromycin, commonly used in the treatment of bacterial infections