Molecular mechanics carculations (MM2) have been carried out for conformers of the 6β-Eudesmenes derivatives (compounds 1-6). I (R1,R2=H,OH; R=OH, R1=H) and II (R3=Ac,R4,R5=Me,CH₂OH; R3=H,R4,R5=Me,CH₂OAc). According to the numerical results obtained, the conformational behaviour of the titled compounds can be predected as well as the geometry tendencies of the different products studied. Thus, the coupling constants are calculated theorically, giving results consistent with experimental data.