[Two new phenylethanoid glycosides from Corallodiscus flabellata].

AIM: To study the chemical constituents from Corallodiscus flabellata. METHODS: Fresh plant of Corallodiscus flabellata was extracted twice with boiling water, filtered to remove insoluble materials, concentrated under reduced pressure at temperature 55 degrees C to a small volume. The concentrated liquor was subjected to solvent-solvent partitioning using ether, ethyl acetate, and n-butanol (saturated with water). The fraction of ethyl acetate extract was chromatographed over macroporous adsorption resin (Diaion HP-20) eluted with a mixture of H2O and MeOH in increasing MeOH content. Their fractions from resin were repeatedly chromatographed over Sephadex LH-20, Toyopearl HW-40, gel MCI, Gel CHP-20 and silica gel column. Structures of compounds obtained were identified on the basis of their spectral data, hydrolysis and chemical correlation. RESULTS: Two phenylethanoid glycosides (I, II) and three phenolic acids were obtained from the EtOAc fraction of water-extracts. Their structures were identified as 3,4-dihydroxyphenylethanol-8-O-[beta-D-apiofuranosyl (1-->2)]-beta-D-glucopyranoside (I), 3,4-dihydroxyphenylethanol-8-O-[(5-O- Vanilloyl)-beta-D-apiofuranosyl(1-->2)]-beta-D-glucopyranoside (II), vanillic acid (III), syringic acid (IV) and ferulic acid (V). CONCLUSION: I and II are new compounds. Compounds III, IV and V were isolated from this plant for the first time.

[Isolation and structural identification of phenylethanoid glycosides from Corallodiscus flabellata].

AIM: To study the chemical constituents from Corallodiscus flabellata. METHODS: The compounds were isolated and purified by macroporous adsorption resin, silica gel column chromatography and identified on the basis of their physiochemical and spectral data. RESULTS: Three phenylethanoid glycosides (I-III) were obtained from the n-BuOH fraction of water-extracts. Their structures were elucidated as 3,4-dihydroxyphenylethanol-8-O-[beta-D-apiofuranosyl (1-->3)]-beta-D-glucopyranoside (I), 3,4-dihydroxyphenylethanol-8-O-[4-O-trans-caffeoyl-beta-D-apiofuranosyl (1-->3)-beta-D-glucopyranosyl-(1-->6)]-beta-D-glucopyranoside (II) and 3,4-dihydroxyphenylethanol-8-O-[beta-D-apiofuranosyl(1-->3)-beta- D-glucopyranosyl-(1-->6)]-beta-D-glucopyranoside (III). CONCLUSION: Compounds I, II and III are new compounds.

[Studies on the chemical constituents from herba of Corallodiscus flabellata].

OBJECTIVE: To study the chemical constituents from Corallodiscus flabellata. METHOD: The compounds were isolated with macroporous adsorption resin, silica gel column chromatography and identified on the basis of their physiochemical and spectral data. RESULT: Six compounds were obtained and identified as vanillic acid, 3,4-dihydroxyphenylethyl-8-O-beta-D-glucopyranoside, syringic acid, caffeic acid, isoacteoside, ferulic acid. CONCLUSION: All the compounds were isolated from this plant for the first time.

[Isolation and structure identification of ligan glycosides from pine needles of Pinus massoniana lamb].

AIM: To study the chemical constituents of the pine needles of Pinus massoniana lamb.. METHODS: Various chromatographic techniques were used to separate and purify. Their physico-chemical properties and spectral data (UV, IR, MS, 1H-1 H COSY, HMQC, DEPT, HMBC and ORD ect.) were measured for structure elucication. RESULTS: Three compounds were isolated from the n-BuOH fraction of water-extracts. Their structures were identified as massonianoside A (4), massonianoside A: (7S, 8R)-3, 4, 9'-trihydroxyl-3-methyoxyl-7, 8-dihydrobenzofunan-1'-propanolneoligan-9-O-alpha-L-rhamnopyranoside, massonianoside C (5), (7S, 8R)-9,9'-dihydroxyl-3,3'-dimethyoxyl-7,8-dihydrobenzofunan-1'- propanolneoligan-4-O-alpha-L-rhamnopyranoside and cedrusin-4-O-beta-glucoside (6), (7S, 8R)-3',9,9'-trihydroxyl-3-methoxyl-7,8-dihydrobenzofunan-1'- propanolneoligan-4-O-beta-D-glucopyranoside. CONCLUSION: Compound 4 and 5 are new compounds.