0000000000338886

AUTHOR

Alexander I. Gray

showing 4 related works from this author

Phenolic glycosides from Phagnalon rupestre.

2002

Analysis of the butanol-soluble fraction from the methanolic extract of the aerial parts of Phagnalon rupestre (Asteraceae) has led to the isolation of seven phenolic compounds. Three have been identified on the basis of their NMR spectra as new natural compounds: the lignan 7,7'-bis-(4-hydroxy-3,5-dimethoxyphenyl)-8,8'-dihydroxymethyl-tetrahydrofuran-4-O-beta-glucopyranoside (1), the prenylhydroquinone glycoside 1-O-beta-glucopyranosyl-1,4-dihydroxy-2-(3'-hydroxy-3'-methylbutyl) benzene (2) and the acetophenone glycoside 12-O-beta-glucopyranosyl-9beta,12-dihydroxytremetone (3). The known flavonoids apigenin-7-O-beta-glucoside, luteolin-7-O-beta-glucoside, luteolin-7-O-beta-glucuronide and …

StereochemistryPiceinFlavonoidMolecular ConformationPlant ScienceHorticultureAsteraceaeBiochemistryLignanschemistry.chemical_compoundOrganic chemistryPhenolsGlycosidesMolecular BiologyLignanchemistry.chemical_classificationbiologyQuinonesGlycosideAcetophenonesGeneral MedicineAsteraceaebiology.organism_classificationchemistryApigeninPlant ShootsAcetophenonePhytochemistry
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30-Norfriedelane triterpenes from the stem bark ofCaloncoba glauca

1992

Abstract The stem bark of Caloncoba glauca has yielded three friedelane triterpenes of which two are characterized by the loss of C-30 and the presence of a C-27, C-15 lactone. They were identified, with considerable use of long-range C H coupling studies, as the known compound trichadonic acid (3-oxofriedelan-27-oic acid) and two new 30-norfriedelane derivatives, 3,27-dioxo-30-norfriedelan-20(29)-en-27,15α-lactone (caloncobalactone) and 3,27-dioxo-21β-hydroxy-30-norfriedelan-20(29)-en-17,15α-lactone (21β-hydroxycaloncoba lactone).

chemistry.chemical_classificationStem barkbiologyChemistryStereochemistryPlant ScienceGeneral MedicineHorticulturebiology.organism_classificationBiochemistryTerpeneFlacourtiaceaeTriterpenevisual_artvisual_art.visual_art_mediumOrganic chemistryBarkMolecular BiologyLactonePhytochemistry
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Friedelane triterpenes from the stem bark of Caloncoba glauca

1993

Further investigation of the stem bark of Caloncoba glauca has yielded three minor (D:A)-friedo-oleanane derivatives. These have been identified, on the basis of NMR studies, as the known compound kokoonol [3-oxo-(D:A)-friedo-olean-27-ol] and the novel natural products kokoonal [3-oxo-(D:A)-friedo-olean-27- al] and 3β,21β-dihydroxy-30-nor-(D:A)-friedo-olean-27-oic acid.

chemistry.chemical_classificationStem barkbiologyStereochemistryChemistryPlant ScienceGeneral MedicineHorticulturebiology.organism_classificationBiochemistryTerpeneFlacourtiaceaeTriterpenevisual_artvisual_art.visual_art_mediumBarkMolecular BiologyPhytochemistry
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ChemInform Abstract: Phenolic Glycosides from Phagnalon rupestre

2010

Analysis of the butanol-soluble fraction from the methanolic extract of the aerial parts of Phagnalon rupestre (Asteraceae) has led to the isolation of seven phenolic compounds. Three have been identified on the basis of their NMR spectra as new natural compounds: the lignan 7,7'-bis-(4-hydroxy-3,5-dimethoxyphenyl)-8,8'-dihydroxymethyl-tetrahydrofuran-4-O-beta-glucopyranoside (1), the prenylhydroquinone glycoside 1-O-beta-glucopyranosyl-1,4-dihydroxy-2-(3'-hydroxy-3'-methylbutyl) benzene (2) and the acetophenone glycoside 12-O-beta-glucopyranosyl-9beta,12-dihydroxytremetone (3). The known flavonoids apigenin-7-O-beta-glucoside, luteolin-7-O-beta-glucoside, luteolin-7-O-beta-glucuronide and …

Lignanchemistry.chemical_classificationchemistry.chemical_compoundchemistrybiologyPiceinOrganic chemistryPhagnalon rupestreGlycosideGeneral MedicineAsteraceaebiology.organism_classificationAcetophenoneChemInform
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