Common NMR active nuclei are 1H, 13C ... combined with difference in the relative integrated intensities of the peaks. During the 1970s, two-dimensional NMR was discovered and rapidly evolved NMR into ...

2D 1 H-13 C HSQC NMR spectra were collected and ... carbon and nitrogen isotopic composition, and allow for common adducts. Experimental LC-MS and MS/MS peak lists can be uploaded directly either ...