ABSTRACT
Ficumone, a 2-oxetanone isolated from the fruits of Synsepalum dulcificum, has been characterised as (R*)-4-hydroxy-2-oxetanone by means of spectroscopic methods.
Subject(s)
Fruit/chemistry , Plant Extracts/chemistry , Synsepalum/chemistry , Magnetic Resonance Spectroscopy , Molecular StructureABSTRACT
The stems of Cinnamomum reticulatum Hay (Lauraceae) were extracted with hexane and chloroform successively. A series of new esters, including a mixture of 4-hydroxy-3-methoxyphenethyl derivatives, along with two butanolides, isoobtusilactone A and obtusilactone A, two amides, N-trans-feruloylmethoxytyramine and N-cis-feruloyl-methoxytyramine, three benzenoids, p-hydroxybenzoic acid, syringic acid and vanillic acid, one lignan, (+)-syringaresinol and one steroid, beta-sitostenone, were isolated. The structures of the new esters were elucidated by chemical and physical evidence.
Subject(s)
Cinnamomum/chemistry , Esters/chemistry , Molecular StructureABSTRACT
(-)-N-Formylanonaine (1), (-)-oliveroline (2), (+)-nornuciferine (3), lysicamine (4), (+)-cyperone (5), (+)-epi-yangambin (6), ficaprenol-10 (7), pheophytin a (8), aristophyll C (9) and michephyll A (10) were isolated from the leaves of Michelia alba DC (Magnoliaceae). Among them, 10 is a new compound. The structures of these compounds were characterised and identified by spectral analyses. We have also presented the antioxidation activity of 10.
Subject(s)
Alkaloids/isolation & purification , Antioxidants/isolation & purification , Chlorophyll/analogs & derivatives , Magnoliaceae/chemistry , Plant Extracts/isolation & purification , Terpenes/isolation & purification , Alkaloids/chemistry , Antioxidants/chemistry , Aporphines/chemistry , Aporphines/isolation & purification , Benzothiazoles/metabolism , Chlorophyll/chemistry , Chlorophyll/isolation & purification , Nuclear Magnetic Resonance, Biomolecular , Pheophytins/chemistry , Pheophytins/isolation & purification , Plant Extracts/chemistry , Plant Leaves/chemistry , Spectrometry, Mass, Fast Atom Bombardment , Spectrophotometry, Infrared , Spectrophotometry, Ultraviolet , Sulfonic Acids/metabolism , Terpenes/chemistryABSTRACT
Pressalanine A (1), a new Michelia aristolactam, and pressalanine B (2), a new Michelia dioxoaporphine, have been isolated from Michelia compressa var. lanyuensis (Magnoliaceae), and these structures were determined on the basis of spectroscopic analysis.
