Spin-lattice relaxation times and nuclear Overhauser enhancement factors (NOE) for the individual ring carbons in di-methyl phthalate (DMF) were measured over a wide range of temperatures. The results show that the reorientational correlation function corresponding to the global dynamics in supercooled liquid can be well described by a Davidson-Cole distribution. The viscosity dependence of the reorientational correlation time derived is analysed to investigate the adequacy of the modified Debye equation to description of the microscopic behaviour of supercooled systems.