... Tetrahedron Letters. Volume 47, Issue 22, 29 May 2006, Pages 3629–3631. ... b Chembiotek Research International, Block BN, Plot-7, Sec-V, Salt Lake City, Kolkata 700 091, India. Received 8 March 2006, Revised 22 March 2006, Accepted 23 March 2006, Available online 12 ...