ABSTRACT
Objective: To study the chemical constituents of Alpinia coriacea. Methods: The chemical constituents were separated and purified by silica gel, ODS, Sephadex LH-20 column chromatographies, and preparative HPLC. Their structures were determined by physicochemical properties and spectral data analyses. Results: Fifteen compounds were isolated from A. coriacea, and identified as 4-hydroxybenzaldehyde (1), anisic acid (2), pinocembrin (3), apigenin (4), izalpinin (5), kaempferol (6), 5,7,3',4'-tetrahydroxy-flavanone (7), 3,5-dihydroxy-7,4'-dimethoxyflavone (8), α-tocospiro A (9), stigmast-4-ene-6α-ol-3-one (10), stigmast-4-en-3-one (11), 7-keto-β-sitosterol (12), (22E,24R)-5α, 8α-epidioxyergosta-6,22-dien-3β-ol (13), stigmasterol (14), and β-sitosterol (15). Conclusion: All compounds are isolated from A. coriacea for the first time, among which compounds 2,7, and 9-13 are isolated from the plants of Alpinia L. for the first time.
ABSTRACT
Objective: To investigate the chemical constituents from the Seeds of Nelumbo nucifera. Methods: The chemical constituents were isolated by repeated silica gel chromatography, Sephadex LH-20 gel columns chromatography, medium pressure column chromatography, and semi-preparative liquid chromatography, and their structures were elucidated by chemical properties and spectroscopic analyses. Results: Thirteen compounds were identified to be p-methoxyphenylacetic acid (1), quercetin-3-O-α-L- arabinoside (2), apigenin-6-C-arabinoside-8-C-glucoside (3), naringenin (4), stigmast-4-en-3-one (5), quercetin-3-methyl ether (6), vitexin (7), cosmoslin (8), quercetin (9), apigennin (10), luteolin (11), kaempferol (12), and astragalin (13). Conclusion: Compounds 1-3, 5 and 6 are obtained from the plants of Nelumbo Adans for the first time, and compound 8 is obtained from Nelumbo plumula for the first time.
ABSTRACT
OBJECTIVE: To study the chemical constituents of the whole herb of Flickingeria fimbriata (B1.) Hawkes. METHODS The compounds were isolated by column chromatography on silica gel and Sephadex LH - 20. Their structures were identified by analysis of physicochemical characteristics and spectroscopic evidence and confirmed by comparison of their spectral data with those in the literature. RESULTS: Ten compounds were isolated and identified as pentacosanol(1), 7α-hydroxysitosterol(2), stigmast4-en-3-one(3), 6β-hydroxystigmast4-en-3-one(4), 5α-stigmastan-3-one(5), β-sitosterol(6), ergota-4, 6, 8(14), 22E-tetraene -3-one (7), β-amyrin(8), stigmasta4-ene-3β, 6β-diol(9), and n-tetracosyl ferulate(10), respectively. CONCLUSION All compounds are isolated for the first time from the genus Flickingeria.