Parmar, Virinder S.; Kumar, Ajay; Prasad, Ashok K.; Singh, Sanjay K.; Kumar, Naresh; Mukherjee, Shubhasish; Raj, Hanumantharao G.; Goel, Sanjay; Errington, William; Puar, Mohindar S. Bioorganic and Medicinal Chemistry, 1999 , vol. 7, # 7 p. 1425 - 1436