Amorphous midecamycin acetate(1) was obtained by spray drying a solution of 1 and ethylcellulose in chloroform.

• 以乙基纤维素为稳定剂，三氯甲烷为溶媒，用喷雾干燥法制备较稳定的非晶形醋酸麦迪霉素。