PROBLEM TO BE SOLVED: To provide a new erythromycin derivative useful as an antibiotic substance.SOLUTION: The compound is expressed by formula (A), wherein OZ is a free or protected OH group.COPYRIGHT: (C)2011,JPO&INPIT【課題】新規エリスロマイシン誘導体の提供。【解決手段】式(A)の化合物(OZは遊離の又は保護されたOH基を表わす)。【選択図】なし