H NMR Testing of a Heterocyclic Compound

We need a proton nuclear magnetic resonance (H-NMR) test of a heterocyclic compound, whose identity will not be revealed (but is not an illegal drug), done by a reasonably calibrated 400 Hz machine; sample is in solution state. It would be desirable to be charged by sample, but not necessary.  (I will want to get independent verification that the instrument to be used has been reasonably recently calibrated.)