Two new compounds, melanochromone and 2-ethoxyl-2-(4-hydroxyphenyl)ethanol. were isolated from the whole plants of Melanosoiadum pimpinelloideum II. Boiss. The known compounds isolated were 1-(4-hydroxyphenyl)-1.2etha...Two new compounds, melanochromone and 2-ethoxyl-2-(4-hydroxyphenyl)ethanol. were isolated from the whole plants of Melanosoiadum pimpinelloideum II. Boiss. The known compounds isolated were 1-(4-hydroxyphenyl)-1.2ethanediol. tymine. cimifugin, umtatin. bergenin. daucosterol and stigmasterol. Their structures were determined on the basis of spectral data.展开更多
Inclusion compound of retinoic acid with (-cyclodextrin was prepared by coprecipitating method, the structure of resulting product was studied by elemental analysis, differential scanning caloriemetry(DSC) analysis, F...Inclusion compound of retinoic acid with (-cyclodextrin was prepared by coprecipitating method, the structure of resulting product was studied by elemental analysis, differential scanning caloriemetry(DSC) analysis, FT-IR spectroscopy and X-ray diffractometry, and the formed supramolecule self-assembles in aqueous solution according to molar ratio 2:1 of host-guest.展开更多
Two new xanthone glycosides, tetraswerosides A and B, were isolated from the whole plant of Swertia tertraptera. Their structures were determined as 3-O-beta -D-glucopyranosyl-1-hydroxy-4,7-dimethoxyxanthone and 3-O-[...Two new xanthone glycosides, tetraswerosides A and B, were isolated from the whole plant of Swertia tertraptera. Their structures were determined as 3-O-beta -D-glucopyranosyl-1-hydroxy-4,7-dimethoxyxanthone and 3-O-[beta -D-xylopyranosyl-(1-->6)-beta -D-glucopyranosyl]-1- hydroxy-4,7-dimethoxyxanthone by spectroscopic methods.展开更多
Two new diterpenoids taibairubescensin A (1) and B (2) have been isolated from Isodon rubescens. The structures of compound 1 and 2 were elucidated as 2 beta,3 beta-diacetoxy-11 beta,13 alpha-dihydroxy-ent-kaur- 16-en...Two new diterpenoids taibairubescensin A (1) and B (2) have been isolated from Isodon rubescens. The structures of compound 1 and 2 were elucidated as 2 beta,3 beta-diacetoxy-11 beta,13 alpha-dihydroxy-ent-kaur- 16-en-15-one (1) and 3 beta,11 beta-diacetoxy-2 beta,6 alpha-dihydroxy-ent-kaur-16-en-15-one (2) on the basis of spectroscopic analysis.展开更多
A new 1β-hydroxy-ent-kauren diterpenoid, enanderianin C1, has been isolated from the leaves of Isodon enanderianus, and its structure has been elucidated by spectroscopic evidences.
A new triterpenoid saponin, tomentoside (5), together with prosapogenin CP 4 (1),huzhangoside B (2), C (3) and D (4) was isolated from the ethanolic extract of Anemone tomentosa.its structure was established by spectr...A new triterpenoid saponin, tomentoside (5), together with prosapogenin CP 4 (1),huzhangoside B (2), C (3) and D (4) was isolated from the ethanolic extract of Anemone tomentosa.its structure was established by spectroscopic and chemical evidence.展开更多
A series of new type substituted 5-fluorouracil derivatives, 1-aryl-5-fluorouracil (4a-4f), were synthesized via diaryliodonium salts and the structure of the title compound was finally confirmed by IR, UV. H-1-NMR. M...A series of new type substituted 5-fluorouracil derivatives, 1-aryl-5-fluorouracil (4a-4f), were synthesized via diaryliodonium salts and the structure of the title compound was finally confirmed by IR, UV. H-1-NMR. MS and CHN analysis.展开更多
Three new diterpenoids, gesneroidins DP (1-3), were isolated from Isodon gesneroides. The structure was determined as 3 beta, 7 beta, 11 beta, 15 beta-tetraacetoxy-ent-kaur-16-en-6-one; 15 beta-hydroxy-1 alpha, 3 beta...Three new diterpenoids, gesneroidins DP (1-3), were isolated from Isodon gesneroides. The structure was determined as 3 beta, 7 beta, 11 beta, 15 beta-tetraacetoxy-ent-kaur-16-en-6-one; 15 beta-hydroxy-1 alpha, 3 beta, 6 alpha, 7 beta, 11 beta-pentaacetoxy-ent-kaur-16-ene; 6 alpha,11 beta-dihydroxy-3 beta, 7 beta-diacetoxy-ent-kaur-16-en-15-one based on 1D and 2D NMR techniques (COSY, NOESY, HXTCOR, COLOC).展开更多
基金We are indebted to Di-Ao Science Foundation for the financial support.
文摘Two new compounds, melanochromone and 2-ethoxyl-2-(4-hydroxyphenyl)ethanol. were isolated from the whole plants of Melanosoiadum pimpinelloideum II. Boiss. The known compounds isolated were 1-(4-hydroxyphenyl)-1.2ethanediol. tymine. cimifugin, umtatin. bergenin. daucosterol and stigmasterol. Their structures were determined on the basis of spectral data.
文摘Inclusion compound of retinoic acid with (-cyclodextrin was prepared by coprecipitating method, the structure of resulting product was studied by elemental analysis, differential scanning caloriemetry(DSC) analysis, FT-IR spectroscopy and X-ray diffractometry, and the formed supramolecule self-assembles in aqueous solution according to molar ratio 2:1 of host-guest.
基金This work was supported by the''Xi Bu Zhi Guang''Foundation of the Chinese Academy of Sciences.
文摘Two new xanthone glycosides, tetraswerosides A and B, were isolated from the whole plant of Swertia tertraptera. Their structures were determined as 3-O-beta -D-glucopyranosyl-1-hydroxy-4,7-dimethoxyxanthone and 3-O-[beta -D-xylopyranosyl-(1-->6)-beta -D-glucopyranosyl]-1- hydroxy-4,7-dimethoxyxanthone by spectroscopic methods.
文摘Two new diterpenoids taibairubescensin A (1) and B (2) have been isolated from Isodon rubescens. The structures of compound 1 and 2 were elucidated as 2 beta,3 beta-diacetoxy-11 beta,13 alpha-dihydroxy-ent-kaur- 16-en-15-one (1) and 3 beta,11 beta-diacetoxy-2 beta,6 alpha-dihydroxy-ent-kaur-16-en-15-one (2) on the basis of spectroscopic analysis.
文摘A new 1β-hydroxy-ent-kauren diterpenoid, enanderianin C1, has been isolated from the leaves of Isodon enanderianus, and its structure has been elucidated by spectroscopic evidences.
文摘A new triterpenoid saponin, tomentoside (5), together with prosapogenin CP 4 (1),huzhangoside B (2), C (3) and D (4) was isolated from the ethanolic extract of Anemone tomentosa.its structure was established by spectroscopic and chemical evidence.
文摘A series of new type substituted 5-fluorouracil derivatives, 1-aryl-5-fluorouracil (4a-4f), were synthesized via diaryliodonium salts and the structure of the title compound was finally confirmed by IR, UV. H-1-NMR. MS and CHN analysis.
