Narasimhan, S.; Balakrishnan, M.; Kumar, A. S.; Venkatasubramanian, N.
Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1985 , vol. 24, p. 568 - 570

Wang, Sheng; Li, Yuyan; Liu, Yonghui; Lu, Aijun; You, Qidong
Bioorganic and Medicinal Chemistry Letters, 2008 , vol. 18, # 14 p. 4095 - 4097

Narasimhan, S.; Balakrishnan, M.; Kumar, A. S.; Venkatasubramanian, N.
Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1985 , vol. 24, p. 568 - 570