15N-NOESY-HSQC 

https://doi.org/10.1351/goldbook.08308
Three-dimensional nuclear magnetic resonance spectroscopy for the assignment of protein structure with one nitrogen and two hydrogen dimensions.
Note:
Magnetization is exchanged between all hydrogens using the nuclear Overhauser effect before being transferred to neighbouring \(\ce{^{15}N}\) nuclei and then back to \(\ce{^{1}H}\) for detection. This spectrum can be used to obtain restraints for structure calculations.
Source:
PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 680 (https://doi.org/10.1515/pac-2019-0203)