Two NMR experiments had already been described that use 13 C isotopomers to measure the coupling between chemically equivalent protons. Firstly, Luy et al. proposed a TOCSY-based experiment with a bandselective 1 H spinlock that simultaneously excites the 12 C-bound signal and the 13 C-satellites, which encodes the 1 H-1 H coupling as a signal amplitude modulation. Secondly, Parella and coworkers designed the Isotope Filtered SERF (IFSERF) experiment that instead uses a single bandselective 180° pulse combined with 2DJ spectroscopy. Conceptually, SATASERF can be seen as a successor to IFSERF, but with full absorption mode line shapes as a key improvement. Furthermore, the design of both the TOCSY and IFSERF experiments in practice limits their use to the measurement of couplings between the chemical shift degenerate protons, and not those involving their other coupling partners. The requirement to simultaneously irradiate the 12 C-and 13 C-bound proton partners also implies that the bandselective region covered is 2-3 times wider than what would have been needed with the individual Wsand WI-selective pulses in SERFBIRD and SATASERF. In practice this means that it would be much harder to avoid irradiation of nearby coupling partners in crowded regions than when using the new experiments. Adding also the benefits of pure shift resolution, SERFBIRD and SATASERF thus present a much wider scope of application than these previous methods.