2D JHMBC
From NMR Wiki
Varian and Bruker pulse programs available here
References
Meissner, A., Sorensen, O.W.. Measurement of J (H, H) and long range J (X, H) coupling constants in small molecules. Broadband XLOC and J-HMBC
Varian and Bruker pulse programs available here
Meissner, A., Sorensen, O.W.. Measurement of J (H, H) and long range J (X, H) coupling constants in small molecules. Broadband XLOC and J-HMBC