ABSTRACT
OBJECTIVE: To isolate and identify the chemical constituents from the whole plant of Pyrethrum tatsienense, which has been used as traditonal herb medicine in the treatment of some diseases. METHODS: The compounds were isolated by column chromatography and their structures were elucidated through spectroscopic analysis (NMR). RESULTS: Six compounds were isolated and identified as: linoeic acid, pinoresinol, (+)-pinoresinol-4'-O-beta-D- glucopyranoside, betulabuside A, dihydrosyringin. CONCLUSION: All these compounds were obtained from Pyrethrum tatsienense for the first time.
Subject(s)
Chrysanthemum cinerariifolium/chemistry , Furans/isolation & purification , Lignans/isolation & purification , Linoleic Acids/isolation & purification , Plants, Medicinal/chemistry , Drugs, Chinese Herbal/chemistry , Drugs, Chinese Herbal/isolation & purification , Furans/chemistry , Glucosides/chemistry , Glucosides/isolation & purification , Lignans/chemistry , Linoleic Acids/chemistry , Magnetic Resonance Spectroscopy/methods , Molecular Structure , Monoterpenes/chemistry , Monoterpenes/isolation & purificationABSTRACT
THE TITLE COMPOUND [SYSTEMATIC NAME: (2S*,3S*,4R*,5R*,9S*,11S*,15R*)-5,15-diacet-oxy-3-nicotino-yloxy-14-oxolathyra-6(17),12(E)-diene], C(30)H(37)NO(7), was isolated from the seeds of Euphorbia lathyris. The tricyclic diterpenoid molecule contains an 11-membered ring, a five-membered ring exhibiting an envelope conformation and a three-membered ring. The 11-membered ring is cis-fused with the three-membered ring and trans-fused with the five-membered ring.
ABSTRACT
p-Nitrobenzoyl tetramethylguanidine and m-nitrobenzoyl tetramethylguanidine were synthesized by simple methods. Their main IR and Raman spectra were measured, quantum-calculated, and assigned by the program Gaussian 98. The results showed that the theoretical spectra were in good agreement with the experimental ones, and can be used as a guidance in the interpretation of experimental spectra.
Subject(s)
Guanidines/chemistry , Molecular Structure , Spectroscopy, Fourier Transform Infrared , Spectrum Analysis, RamanABSTRACT
Two novel and eight known triterpenoids were isolated from alcoholic extract of the whole plant of Pyrethrum tatsienense. The structures of new compounds were elucidated as olean-12-en-3beta,11alpha,16beta-triol-3-O-palmitate (1), ursa-12-en-3beta,11beta,16beta-triol-3-O-palmitate (2) by spectroscopic methods including intensive 2D NMR techniques (H1-H1 COSY, gHMQC, gHMBC) and FAB-MS, and the known compounds were identified on the basis of comparing their NMR data with those of corresponding compounds in the literature.
Subject(s)
Chrysanthemum cinerariifolium/chemistry , Triterpenes/chemistry , Ethanol , Magnetic Resonance Spectroscopy , Plant Extracts/chemistry , Solvents , Spectrometry, Mass, Fast Atom Bombardment , Triterpenes/isolation & purificationABSTRACT
OBJECTIVE: To study the water-soluble chemical constituents in root of Achyranthes bidentata. METHOD: The chemical constituents were isolated by silica gel column chromatography and the structures were elucidated by the NMR spectra and physico-chemical properties. RESULT: Seven compounds were obtained and identified as n-butyl-beta-D-fructopyranoside (I), oleanoic acid (II), 3-O-[beta-D-glucopyranosyl], oleanoic acid 28-O-beta-D-glucopyranoside (III), allantoin (IV), 20-hydroxy ecdysone (V), glutamic acid (VI), 3-O-[beta-D-glucopyranosyl], oleanoic acid 28-O-beta-D-glucopyranosyl ester (VII). CONCLUSION: Compounds III-VII were obtained from this plant for the first time.
Subject(s)
Achyranthes/chemistry , Allantoin/isolation & purification , Ecdysterone/isolation & purification , Glutamic Acid/isolation & purification , Plants, Medicinal/chemistry , Allantoin/chemistry , Ecdysterone/chemistry , Glutamic Acid/chemistry , Plant Roots/chemistryABSTRACT
OBJECTIVE: To study the constituents of volatile oil from Ocimum basilicum. METHOD: GC-MS technique was used. RESULT: Forty-five compounds was elucidated through consulting literature and searching database by computer. CONCLUSION: The main constituent in volatile oil from O. basilicum are 1, 7-dimethyl-1, 6-octadien-3-ol, which accounts for 29.87%.
