Rajak, Harish; Agarawal, Avantika; Parmar, Poonam; Thakur, Bhupendra Singh; Veerasamy, Ravichandran; Sharma, Prabodh Chander; Kharya, Murli Dhar Bioorganic and Medicinal Chemistry Letters, 2011 , vol. 21, # 19 p. 5735 - 5738