In one form of this technique, distortionless enhancement by polarization transfer is an alternative to the APT. The Karplus equation relates (10[1])dihedral angles to the coupling constant measured in this technique. Most forms of this technique use a Fourier transform to analyze (-5[1])the free induction decay that occurs as a result of relaxation. TMS is used as a standard in several forms of this technique, which normalizes (10[1])frequencies of peaks to chemical shift. (10[1])This technique’s most common forms use hydrogen-1 and carbon-13 (10[1])since they have a non-zero (-5[1])spin. (-5[1])For 10 points, name this technique where chemical structures are determined by a strong (-5[1])magnetic field applied to nuclei. ■END■ (10[1]0[2])