The DEPT (Distortionless ehancement by Polarization Transfer) experiment is used to determine the multiplicity of carbon atoms, that is, whether they are C, CH, CH2, or CH3. The DEPT 135 experiment used at Columbia gives inverted CH2 and C groups. CH and CH3 groups are upright. The DEPT 90 produces inverted C groups and upright CH's. The CH2's and CH3's are nulled.
Below is a group of spectra taken of sucrose at 300 MHz.