
Keywords: رزونانس دوگانه چرخش-اکو; CP-MAS; cross polarization magic angle spinning; DD-MAS; dipolar decoupling magic angle spinning; CSA; chemical shift anisotropy; DARR; 13C-13C correlation spectra with dipolar assisted rotational resonance; WISE; 1H-13C wideline separation; HETCOR; h