Sheng, Chunquan; Che, Xiaoying; Wang, Wenya; Wang, Shengzheng; Cao, Yongbing; Miao, Zhenyuan; Yao, Jianzhong; Zhang, Wannian
European Journal of Medicinal Chemistry, 2011 , vol. 46, # 11 p. 5276 - 5282

Sah; Cheng
Recueil des Travaux Chimiques des Pays-Bas, 1939 , vol. 58, p. 591,592,593