“…The first strategy to average out homonuclear proton-proton interactions using radio-frequency (rf) fields in static samples was suggested by Lee and Goldburg (Goldburg and Lee, 1963;Lee and Goldburg, 1965). Since then, many homonuclear decoupling sequences have been developed including solid-echo based sequences (WAHUHA (Waugh et al, 1968), MREV (Mansfield and Grannell, 1971;Rhim et al, 1973), BR-24 Rhim, 1979a, 1979b)), time-reversal sequences (Rhim et al, 1971), C-and R-symmetry based sequences (Levitt, 2007;Madhu et al, 2001;Paul et al, 2010), tilted magic-echo-based sequences (Gan et al, 2011;Lu et al, 2012;Nishiyama et al, 2012), and computeroptimized sequences like DUMBO (Grimminck et al, 2011;Halse and Emsley, 2012;Sakellariou et al, 2000;Salager et al, 2009). Each of these sequences has their own advantages and disadvantages in terms of robustness for different MAS spinning regimes and requirements for the radio-frequency field strength.…”