7 结果
Methyl 4-(geranyloxy)-3-hydroxybenzoate (6), previously unreported, has been identified from the New Zealand liverwort Trichocolea hatcheri. Four new related 3-hydroxybenzoates 7-10 were also found, with a carbonyl at C-5 of the geranyl group and various double bond arrangements. Two known geranyl
The main cytotoxic component in New Zealand collections of the liverwort Trichocolea mollissima was identified as methyl 4-[(5-oxogeranyl)oxy]-3-methoxybenzoate, a structure that has not been reported previously. Two double-bond isomers of this geranyl ether were present at lower levels.
The synthesis of three geranyl ethers, methyl 4-[(2E)-3, 7-dimethyl-5-oxo-2,6-octadienyloxy]-3-methoxybenzoate (1), methyl 4-[(2E)-3,7-dimethyl-2,6-octadienyloxy]-3-methoxybenzoate (2), and methyl 4-[(2E)-3,7-dimethyl-2,6-octadienyloxy]-3-hydroxybenzoate (3), previously isolated from New Zealand
The incorporation of 13C labelled glucose into trichocolein, deoxytomentellin, trans-phytol and stigmasterol has been studied in axenic cultures of the liverwort Trichocolea tomentella. Quantitative 13C NMR spectroscopic analysis of the resulting labelling patterns showed that the isoprene units of
One new chlorinated xanthone, 6-chloro-3,8-dihydroxy-1-methylxanthone (1), a new 2-bromo-gentisyl alcohol (2), and a mixture of 6-epimers of 6-dehydroxy-6-bromogabosine C (3a and 3b), together with 19 previously identified compounds, epoxydon (4), norlichexanthone (5), 2-chlorogentisyl alcohol (6),
Six Tahitian liverworts, Trichocolea pluma, Chandonanthus hirtellus, Mastigophora diclados, Jungermannia sp., Plagiochila sp. and Cyathodium foetidissimum were chemically investigated. All of these liverworts produce their own characteristic compounds. Vanillic acid methyl ester was isolated for the
Ent-homocyclopiamine B (1), a new prenylated indole alkaloid bearing an alicyclic nitro group along with 2-methylbutane-1,2,4-triol (2) were isolated from an endophytic fungus Penicillium concentricum of the liverwort Trichocolea tomentella (Trichocoleaceae). The