[1] Univ Nacl Autonoma Mexico, Dept Bioestructura, Inst Quim, Mexico City 04510, DF, Mexico
[2] Escuela Nacl Ciencias Biol, Dept Quim Organ, IPN Prolongac Carpio & Plan Ayala, Mexico City 11340, DF, Mexico
[3] Univ Nacl Autonoma Mexico, Dept Quim Inorgan & Nucl, Fac Quim, Mexico City 04510, DF, Mexico
[4] Inst Technol Tijuana, Ctr Graduados & Invest, Baja California, Mexico