The Strychnos alkaloids have been the focal point of considerable synthetic and spectroscopic effort. We now report the 15 N chemical shifts and long‐range 1 H‐ 15 N coupling pathways of strychnine, brucine, and holstiine at natural abundance. Long‐range coupling pathways were established using a gradient‐enhanced HMQC sequence optimized for the observation of 1 H‐ 15 N long‐range couplings.
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Martin et al. (1995) studied this question.
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