1. Department of Chemistry and
Biochemistry, Baylor University, Waco, Texas 76798, United States
2. Department of Chemistry
and
Biochemistry, Baylor University, Waco, Texas 76798, United States
3. Departamento de
Quimica Organica, Universidad de Vigo, 36310, Vigo, Spain
4. Departamento de Quimica Organica, Universidad de Vigo, 36310, Vigo, Spain