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[Chemical constituents of ethyl acetate fraction from Aeschynanthus bracteatus].

Qiang Wang, Fanghui Xu

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Abstract

OBJECTIVE: To study the constituents of EtOAc extract from Aeschynanthus bracteatus. METHODS: The constituents were isolated and purified by chromatography on silica gel and the structures of the compounds were determined by MS and NMR spectral analysis. RESULTS: On the basis of spectroscopic analysis and comparison with the reported data, compounds were identified as koaburaside (1), coniferaldehyde (2), syringaldehyde (3), sinapinaldehyde (4), 2,4'-dihydroxyacetophenone (5), piceol (6), beta-daucosterol (7), beta-sitosterol (8). CONCLUSION: Compounds 1 and 2 are obtained from this genus for the first time.

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What this paper is about

OBJECTIVE: To study the constituents of EtOAc extract from Aeschynanthus bracteatus. METHODS: The constituents were isolated and purified by chromatography on silica gel and the structures of the compounds were determined by MS and NMR spectral analysis. RESULTS: On the basis of spectroscopic analysis and comparison with the reported data, compounds were identified as koaburaside (1), coniferaldehyde (2), syringaldehyde (3), sinapinaldehyde (4), 2,4'-dihydroxyacetophenone (5), piceol (6), beta-daucosterol (7), beta-sitosterol (8). CONCLUSION: Compounds 1 and 2 are obtained from this genus for the first time.

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Available abstract

OBJECTIVE: To study the constituents of EtOAc extract from Aeschynanthus bracteatus. METHODS: The constituents were isolated and purified by chromatography on silica gel and the structures of the compounds were determined by MS and NMR spectral analysis. RESULTS: On the basis of spectroscopic analysis and comparison with the reported data, compounds were identified as koaburaside (1), coniferaldehyde (2), syringaldehyde (3), sinapinaldehyde (4), 2,4'-dihydroxyacetophenone (5), piceol (6), beta-daucosterol (7), beta-sitosterol (8). CONCLUSION: Compounds 1 and 2 are obtained from this genus for the first time.

Key concepts: Syringaldehyde, Daucosterol, Chemistry, Silica gel, Chromatography, Chemical constituents, Ethyl acetate, Fraction (chemistry)

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