Conformational analysis on cyclohexane, oxane, and thiane derivatives bearing two geminal electron-withdrawing groups and acetoxy substituents at the β and β′ carbons

1. Santoyo-González, F.
2. Molina-Molina, J.
3. Portal-Olea, D.
4. Vargas-Berenguel, A.
5. Martín-Ramos, J.D.
6. Romero-Garzón, J.