3 các kết quả
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
OBJECTIVE
To study the chemical constituents from the ethyl acetate portion of an ethanolic extractive of the leaves of Aeschynanthus mengxinensis.
METHODS
The column chromatographic techniques were applied to isolate constituents. A combination of IR, ESI-MS, NMR and 2D-NMR spectroscopy was used to
OBJECTIVE
To study the chemical constituents from Aeschynanthus longicaullis.
METHODS
The column chromatographic techniques were applied to isolate the constituents. The spectroscopie methods were used of EI-MS and NMR to identify the structures of the separated compounds.
RESULTS
Seven compounds