Thakur, Pallavi; Boyapelly, Kumaraswamy; Gurram, Raji Reddy; Bandichhor, Rakeshwar; Mukkanti, Khagga Tetrahedron Asymmetry, 2012, vol. 23, # 9 p. 659 - 661 doi: 10.1016/j.tetasy.2012.05.002