Trofimov, Boris A.; Vasil'tsov, Alexander M.; Mikhaleva, Al'bina I.; Ivanov, Andrey V.; Skital'tseva, Elena V.; Schmidt, Elena Yu.; Senotrusova, Elena Yu.; Ushakov, Igor A.; Petrushenko, Konstantin B. Tetrahedron Letters, 2009 , vol. 50, # 1 p. 97 - 100