Abstract
A new dimeric aporphine alkaloid, phoenicanthusine (1), and six known alkaloids were isolated from the stem bark of Phoenicanthus obliqua. The structure of 1 was elucidated by 1D ((1)H, (13)C) and 2D ((1)H-(1)H COSY, HMQC, HMBC, and NOESY) NMR and HRMS studies. Phoenicanthusine represents the first example of a N-6--C-4' and C-7--C-5' linked dimeric aporphine alkaloid.
MeSH terms
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Annonaceae / chemistry*
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Aporphines / chemistry
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Aporphines / isolation & purification*
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Chromatography, Thin Layer
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Molecular Conformation
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Molecular Structure
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Nuclear Magnetic Resonance, Biomolecular
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Plant Stems / chemistry
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Plants, Medicinal / chemistry*
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Spectrophotometry, Infrared
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Spectrophotometry, Ultraviolet
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Sri Lanka
Substances
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7,7'-bis(dehydro-O-methylisopiline)
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7-dehydronuciferyl-7'-dehydro-O-methylisopiline
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Aporphines
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phoenicanthusine
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urabaine