Singh, Pradeep N.D.; Klima, Rodney F.; Muthukrishnan, Sivaramakrishnan; Murthy, Rajesh S.; Sankaranarayanan, Jagadis; Stahlecker, Heidi M.; Patel, Bhavika; Gudmundsdottir, Anna D. Tetrahedron Letters, 2005 , vol. 46, # 24 p. 4213 - 4217