1. Instituto de Química,Universidad Nacional Autónoma de México, Circuito Exterior S/N Ciudad Universitaria, Coyoacán, Mexico City 04510 Mexico
2. Department of Chemistry and Biochemistry, Montana State University, 103 Chemistry and Biochemistry Building, Bozeman, Montana 59717, United States
3. Institute of Organic Chemistry and Biochemistry,Czech Academy of Sciences, Flemingovo nám. 2, 160 00 Prague, Czech Republic
4. Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720-8229, United States