【Ingredients】

The active agent of the drug is erythromycin cyclocarbonate.

The chemical name of the active agent is: (2r,3s,4s,5r,6r,8r,9r,10r,11r,12s,13r)-3-[(2,6- deoxy --3-c-methyl-3-o -methyl-α -He-pyran carbon)oxygen]-13-ethyl-9-hydroxyl-2，4，6，8,10,12- liu methyl-5-[(3,4,6-Trideoxygenation -3-(dimethylamino)-β-d-Mu-pyran carbon) oxygen]-14-Yangza Shisi Yuanhuan-6,9-oxygen-1,9-diketone ring11,12-carbonate

Chemically structural formula：

Molecular formula：C₃₈H₆₅NO₁₄ 

Molecular weight：759.9