magic angle spinning nuclear magnetic resonance spectroscopy proton detected separated local field spectroscopy R-type recoupling proton detected separated local field spectroscopy PDLF with R-type recoupling R-PDLF CHMO:0001068 R-type recoupling proton detected local field spectroscopy A magic-angle spinning NMR experiment to measure dipolar couplings. Dipolar couplings are reintroduced by synchronising rf pulses with the rotation of the rotor. Spectral simplification occurs via the proton detected separated local field protocol where 1H-1H interactions are decoupled and proton magnetisation is passed through 13C nuclei present at natural abundance. proton-deteced separated local field spectroscopy with R-type recoupling