The absolute stereochemistry of bruceines D, E and H has been confirmed to be 1S, 5S, 7R, 8R, 9R, 10S, 11R, 12S, 13R, 14R, 15R and additionally 2S for bruceine E by a combination of 2D nmr [1H‐1H and 1H‐13C (one‐bond and long‐range) COSY] nOe and cd spectroscopic analyses.
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Li et al. (1989) studied this question.
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