MAGNETIC RESONANCE IN CHEMISTRY, VOL. ... As expected, the XHCORR 2D-NMR spectrum showed the axial N-CH, resonance to be the one which is upfield (2.08 ... 75.5 MHz, DEPT 135" pulse width, CD,Cl,, 298 K, 6 55.0-50.0) showing the N-methyl resonances of nefopam ...