CJCU
Synthesis, Spectra and Stereochemistry of β-Lactam Derivatives of 1,5-Benzothiazepines
LI Yuan, DU Cai-Yun, YANG Qiu-Qing, JIN Sheng, XING Qi-yi
Chem. J. Chinese Universities . 1999, (6): 906 -908 .