Fourier transform synchrotron spectroscopy of torsional and CO-stretching bands of CH317OH

► The far-infrared and CO-stretching synchrotron FT spectra of CH317OH were investigated. ► We assigned 123 new torsion-rotation ground state sub-bands. ► We determined Fermi shifts for five CO substates due to K-localized perturbations. ► Two Coriolis level-crossing resonances have also been observed. ► The sub-band origins were fitted to a torsion-rotation Hamiltonian.