Chanti Babu, Dokuburra; Jon Paul Selavam, Jondoss; Kumar Reddy, Dorigondla; Shekhar, Vanam; Venkateswarlu, Yenamandra Tetrahedron, 2011, vol. 67, # 21 p. 3815 - 3819 doi: 10.1016/j.tet.2011.03.107