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note
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More detailed information about these reactions will be provided in a full paper.
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0344115046
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The stereochemistry of the oxindole and ethyl group was proven unambiguously in 24. Distinct NOEs between C10 and C15 protons and C8 and C9 protons were observed.
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0344115045
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note
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We are very grateful to Professor H. Takayama of Chiba University (Japan) for NMR spectra and a sample of (-)-getsedine.
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