【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
