  An experimental approach in conducting NMR measurements at supercritical
parameters of state is discussed. A novel design of the high-pressure NMR cell
was developed which allowed eliminating the field inhomogeneity and, thus,
increasing the sensitivity of the experiment at the supercritical state.
Analysis of the MD simulations and NMR data showed that two conformers of
ibuprofen dominate in the solution in supercritical CO2 along the critical
isochore 1.3 \r{ho}cr(CO2). Conformer populations calculated from MD
simulations and from NMR spectra agree with each other
