9 Puckering free energy landscapes (in kJ/mol) obtained by the combined meta- dynamics – umbrella sampling, for the series of α -d- aldopyranoses simulated using the new force field parameters. Isolines are drawn every 10 kJ/mol, starting from the global minimum. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 

