Design and Synthesis of Oleanolic Acid Rings A and C Lactone Derivatives
Yu Fei, Zheng Yongxiang, Peng Yiyun, Zhou Demin, Xiao Sulong
Chin. J. Org. Chem. . 2016, (3): 512 -519 .  DOI: 10.6023/cjoc204509001