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Acylphloroglucinol derivatives from Hypericum prolificum.

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Three new acylphloroglucinol derivatives have been isolated from the hexane extract of the aerial parts of Hypericum prolificum L.: prolificin A (1), prolifenone A (2), and prolifenone B (3). The structures were elucidated on the basis of extensive 2D NMR and MS data. All three compounds were

Biomimetic synthesis of polycyclic polyprenylated acylphloroglucinol natural products isolated from Hypericum papuanum.

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Biomimetic syntheses of three polycylic polyprenylated acylphloroglucinol natural products isolated from Hypericum papuanum, ialibinone A, ialibinone B, and hyperguinone B, have been accomplished by selective oxidative cyclizations of the proposed biosynthetic precursor 5, which was synthesized from

Tricyclic Acylphloroglucinols from Hypericum lanceolatum and Regioselective Synthesis of Selancins A and B.

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The chemical investigation of the chloroform extract of Hypericum lanceolatum guided by (1)H NMR, ESIMS, and TLC profiles led to the isolation of 11 new tricyclic acylphloroglucinol derivatives, named selancins A-I (1-9) and hyperselancins A and B (10 and 11), along with the known compound

Polycyclic Polyprenylated Acylphloroglucinol Congeners from Hypericum scabrum.

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Twenty polycyclic polyprenylated acylphloroglucinols (PPAPs), including the new compounds hyperscabrones A-I (1-9), were isolated from the air-dried aerial parts of Hypericum scabrum. These compounds comprise seven different structural types. All structures were determined by NMR spectroscopic

Hypascyrins A-E, Prenylated Acylphloroglucinols from Hypericum ascyron.

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Six new prenylated acylphloroglucinols with menthane moieties, hypascyrins A-E (1-5) and ent-hyphenrone J (6), together with four known analogues, were isolated from Hypericum ascyron roots. Detailed spectroscopic data analyses resulted in the assignment of their

Human neutrophil elastase (HNE) inhibitory polyprenylated acylphloroglucinols from the flowers of Hypericum ascyron.

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In the course of an investigation of human neutrophil elastase (HNE) associated with inflammation, the extract of the flower parts of Hypericum ascyron showed a significant influence to HNE. The responsible metabolites to HNE inhibition were found to be eight polyprenylated acylphloroglucinols,

Yezo'otogirins D-H, Acylphloroglucinols and Meroterpenes from Hypericum yezoense.

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Investigation of the methanolic extract from the aerial parts of Hypericum yezoense resulted in the isolation of three new acylphloroglucinols, yezo'otogirins D-F (1-3), and two new meroterpenes, yezo'otogirins G (4) and H (5). The structures of 1-5 were assigned on the basis of spectroscopic data.

Polycyclic polyprenylated acylphloroglucinols from Hypericum choisianum.

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Twenty-one polycyclic polyprenylated acylphloroglucinols, including three new compounds named as hyperichoisins A (3), B (14) and C (21), were isolated from the aerial parts of Hypericum choisianum. The structures of those new compounds were elucidated by analysis of

Acylphloroglucinol and xanthones from Hypericum ellipticum.

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An acylphloroglucinol, elliptophenone A, and two xanthones, elliptoxanthone A and elliptoxanthone B, were isolated from the aerial portions of Hypericum ellipticum together with three known xanthones, 1,3,7-trihydroxy-8-(3-methyl-2-butenyl)-9H-xanthen-9-one, 1,6-dihydroxy-4-methoxy-9H-xanthen-9-one,

Przewalcyrones A-F, epoxychromene-containing polycyclic polyprenylated acylphloroglucinols with immunosuppressive activity from Hypericum przewalskii Maxim.

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Chemical investigation of the extracts of the aerial parts of Hypericum przewalskii Maxim. resulted in the isolation and identification of six new epoxychromene-containing polycyclic polyprenylated acylphloroglucinols (PPAPs), named przewalcyrones A-F (1-6), and one known analogue (7). All of the

Cytotoxic prenylated acylphloroglucinols from Hypericum annulatum.

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A phytochemical investigation of the aerial parts of Hypericum annulatum Moris led to the isolation of five new prenylated acylphloroglucinol derivatives hyperannulatins A-E (1-3, 5 and 7) in addition to the known hypercalyxone A (4) and 3-geranyl-1-(2'-methylpropanoyl)phloroglucinol (6). The

Anti-staphylococcal acylphloroglucinols from Hypericum beanii.

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As part of an ongoing project to investigate the anti-staphylococcal properties of the Hypericum genus, an acylphloroglucinol, 1,5-dihydroxy-2-(2'-methylpropionyl)-3-methoxy-6-methylbenzene (1), was isolated from the dichloromethane extract of the aerial parts of H. beanii (Guttiferae), together

Acylphloroglucinol derivatives from Hypericum andinum: antidepressant-like activity of andinin A.

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A new dimeric acylphloroglucinol derivative, andinin A (1), was isolated from the underground plant parts of Hypericum andinum, along with three known dimeric acylphloroglucinols, uliginosin A (2), uliginosin B (3), and isouliginosin B (4). The structure of 1 was elucidated using 1D and 2D NMR and

Norsampsones A-D, four new decarbonyl polycyclic polyprenylated acylphloroglucinols from Hypericum sampsonii.

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Norsampsones A-D (1-4), four new decarbonyl polycyclic polyprenylated acylphloroglucinols, together with a new biogenetically related compound hypersampsone M (5), were isolated from the aerial parts of Hypericum sampsonii. Norsampsones A-D featured an unprecedented carbon skeleton with the loss of

Antibacterial and cytotoxic activity of prenylated bicyclic acylphloroglucinol derivatives from Hypericum amblycalyx.

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Two new bicyclic acylphloroglucinol derivatives, hypercalyxone A (1-[5,7-dihydroxy-2-methyl-3-(3-methyl-but-2-enyl)-2-(4-methyl-pent-3-enyl)-chroman-8-yl]-2-methyl-propan-1-one, 1) and B (1-[5,7-dihydroxy-2-methyl-3-(3-methyl-but-2-enyl)-2-(4-methyl-pent-3-enyl)-chroman-8-yl]-2-methyl-butan-1-one,

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