Despite the inherently low sensitivity of 15 N NMR because of its low gyromagnetic ratio (γ
N ) and its relatively low natural abundance (0.37%), this important nuclide still has useful …

A further refinement of the recently reported IMPEACH‐MBC long‐range heteronuclear shift
correlation experiment is described. The new experiment, CIGAR‐HMBC (constant time …

We report a comparison of the results obtained at 500 MHz for heteronuclear shift correlation
(HSQC) experiments with very small natural product samples using conventional and …

The development of a series of new, accordion-optimized long-range heteronuclear shift
correlation techniques has been reported. A further derivative of the constant time variable …

Phase I oxidative metabolism of nitrogen-containing drug molecules to their corresponding
N-oxides is a common occurrence. There are instances where liquid chromatography/…

Identification of degradants of pharmaceuticals is a necessary challenge of the drug
development process following the subjection of candidate molecules to a variety of physico‐…

A modification of the recently reported ACCORD-HMBC longrange heteronuclear shift correlation
experiment is described. The new experiment, IMPEACH-MBC (improved performance …

Long‐range correlations observed with the recently reported ACCORD‐HMBC pulse
sequence using both static and accordion optimization of the long‐range coupling delay are …

Numerous indoloquinoline alkaloid structures have been identified from extracts of the West
African plant Cryptolepis sanguinolenta. Recently, through the use of 2D NMR methods and …

We present what we believe to be the first documented example of an inducement of distinctly
different secondary structure types onto agonists and antagonists selective for the same G-…