55224-05-0 CWE Carbonato ciclico de eritromicina A [Spanish] Cykliczny weglan erytromycyny A [Polish] Davercin Dravercin Eritromicina A carbonato [Spanish] Erythromycin A 11,12-carbonate Erythromycin A cyclic 11,12-carbonate Erythromycin A cyclic carbonate Erythromycin, cyclic 11,12-carbonate