Abstract
AbstractAn assignment strategy that utilizes one‐dimensional lanthanide‐induced methyl proton shifts, reported 13C NMR data of model compounds and two‐dimensional 1H and 13C shift correlated spectroscopy, homonuclear proton chemical shift correlated spectroscopy and nuclear Overhauser enhancement spectroscopy methods was demonstrated to be effective for the complete 1H chemical shift assignments of extended proton spin‐systems in a triterpenoid viz., 3‐keto‐urs‐12‐en‐24‐oic acid methyl ester. Complete 13C chemical shift assignments have also been accomplished.
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