incredible natural-abundance double-quantum transfer experiment

acronym: INADEQUATE
https://doi.org/10.1351/goldbook.08367
Nuclear magnetic resonance spectroscopy experiment designed to show homonuclear spin-spin coupling correlations between low natural abundance nuclei such as A13A2213C.
Note:
2D variant shows each coupled pair of nuclei gives a pair of peaks on the INADEQUATE spectrum which both have the same vertical coordinate, which is the sum of the chemical shifts of the nuclei; the horizontal coordinate of each peak is the chemical shift for each of the nuclei separately.
Source:
PAC, 2021, 93, 647. (Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)) on page 693 [Terms] [Paper]