Structural Confirmation of a Derivative of 6, 7; 12, 21-Didehydroerythromycin A  by 13C NMR DEPT Technique
LEI Ping-Sheng, XU Peng, LIU Lu, SHI Yang, YANG Yao
Chinese Journal of Magnetic Resonance . 2005, (1): 55 -60 .