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1. (Article ID: 12004)
Arimoto T, Ichinose T, Yoshikawa T, Shibamoto T
Effect of the natural antioxidant 2"-O-glycosylisovitexin on superoxide and hydroxyl radical generation
Food and Chemical Toxicology 38(9) (2000)
849-852
The inhibitory effect of 2"-O-glycosyl isovitexin (2"-O-GIV) isolated from green barley leaves on superoxide and hydroxyl radical generation was investigated using electron spin resonance spectroscopy. 2"-O-GIV exhibited dose-related inhibitory activity both towards superoxide generation and hydroxyl radical generation. 2"-O-GIV inhibited superoxide formation by 97% at a level of 25 mM and inhibited hydroxyl radical formation by 91% at a level of 500 μM. The results suggest that the inhibitory activity of 2"-O-GIV is due to trapping radicals.
Antioxidant, ESR, hydroxyl radical, superoxide
NCBI PubMed ID: 10930705Publication DOI: 10.1016/s0278-6915(00)00075-2Journal NLM ID: 8207483Publisher: Elsevier, for BIBRA
Correspondence: Shibamoto T
icu.ac.jp>
Institutions: First Department of Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan, Department of Health Sciences, Oita University of Nursing and Health Sciences, Oita, Japan, Department of Environmental Toxicology, University of California, Davis, USA
Methods: HPLC, extraction, CC, antioxidant activities, ESR
The publication contains the following compound(s):
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2. (Article ID: 12373)
Ito H, Koreishi M, Tokuda H, Nishino H, Yoshida T
Cypellocarpins A-C, phenol glycosides esterified with oleuropeic acid, from Eucalyptus cypellocarpa
Journal of Natural Products 63(9) (2000)
1253-1257
Three new phenol glycosides acylated with (+)-oleuropeic acid, cypellocarpins A (1), B (2), and C (3), along with seven known compounds, were isolated from the dried leaves of Eucalyptus cypellocarpa. Structures of the new compounds were determined on the basis of spectroscopic methods, including 2D NMR experiments and chemical degradation. These new compounds and a known related glucoside (7) showed potent in vitro antitumor-promoting activity in a short-term bioassay evaluating the inhibitory effect on Epstein-Barr virus early antigen activation induced by 12-O-tetradecanoyl phorbol 13-acetate (TPA). These compounds also suppressed an in vivo two-stage carcinogenesis induced with nitric oxide and TPA on mouse skin.
antitumor activity, cypellocarpins, Eucalyptus cypellocarpa, carcinogenesis, Epstein-Barr virus
NCBI PubMed ID: 11000030Publication DOI: 10.1021/np0001981Journal NLM ID: 7906882Publisher: American Society of Pharmacognosy
Correspondence: yoshida
pheasant.pharm.okayama-u.ac.jp
Institutions: Faculty of Pharmaceutical Sciences, Okayama University, Okayama, Japan, Kyoto Prefectural University of Medicine, Kyoto, Japan
Methods: 13C NMR, 1H NMR, methylation, inhibition studies, ESI-MS, biological assays, methanolysis, alkaline hydrolysis, UV, extraction, optical rotation measurement, CC, HR-ESI-MS, precipitation, evaporation, centrifugation, PTLC
The publication contains the following compound(s):
- Compound ID: 19181
Structure type: monomer
Trivial name: miquelianin
Compound class: saponin glycoside, glycoside, flavonoid glycoside, flavonol glycoside, flavone glycoside
Reference(s) to other database(s): CCSD:
43105, CBank-STR:1426
- Compound ID: 20822
Structure type: oligomer
C27H30O16
Trivial name: rutin, rutoside, rutin, quercetin rutinoside, rutoside, quercetin 3-O-rutinose, quercetin-3-O-rutinoside, quercetin 3-O-rutinoside
Compound class: saponin glycoside, glycoside, flavonoid glycoside, flavonol glycoside, flavone glycoside
Reference(s) to other database(s): CCSD:
50720, CBank-STR:3399
- Compound ID: 32104
|
Subst-(7-6)-b-D-Glcp-(1-3)-Gallic
Subst = (+)-oleuropeic acid = SMILES O={7}C(O)C1=CC[C@H]({8}C(C)(O)C)CC1 |
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Structure type: monomer
; 499.1810 [M+H]+
C23H30O12
Trivial name: cypellocarpin A
Compound class: glycoside
- Compound ID: 32105
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Subst-(7-6)-b-D-Glcp-(1-7)-Subst1
Subst = (+)-oleuropeic acid = SMILES O={7}C(O)C1=CC[C@H]({8}C(C)(O)C)CC1;
Subst1 = 2,5,7-trihydroxy-2-methylchroman-4-one = SMILES O=C(C{2}C(O)(C)O1)C2=C1C={7}C(O)C={5}C2O |
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Structure type: monomer
; 539.2197 [M+H]+
C26H34O12
Trivial name: cypellocarpin B
Compound class: glycoside
- Compound ID: 32106
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Subst-(7-6)-b-D-Glcp-(1-7)-Subst1
Subst = (+)-oleuropeic acid = SMILES O={7}C(O)C1=CC[C@H]({8}C(C)(O)C)CC1;
Subst1 = 5,7-dihydroxy-2-methyl-4H-chromen-4-one = SMILES O=C(C=C(C)O1)C2=C1{8}C={7}C(O)C={5}C2O |
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Structure type: monomer
; 521 [M+H]+
C26H32O11
Trivial name: cypellocarpin C
Compound class: glycoside
- Compound ID: 32107
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b-D-Glcp-(1-6)-Subst
Subst = endo-2-cineolylol = SMILES O{6}[C@H]1C[C@@H]2C(C)(C)O[C@]1(CC2)C |
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Structure type: monomer
Compound class: glycoside
- Compound ID: 32108
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b-D-1dGlcp-(1C-8)-Subst
Subst = 5,7-dihydroxy-2-methyl-4H-chromen-4-one = SMILES O=C(C=C(C)O1)C2=C1{8}C={7}C(O)C={5}C2O |
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Structure type: monomer
Compound class: glycoside
- Compound ID: 32109
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b-D-Glcp-(1-7)-Subst
Subst = 5,7-dihydroxy-2,2,8-trimethyl-2H-chromene-6-carbaldehyde = SMILES CC(O1)(C)C=CC2=C1C(C)={7}C(O)C(C=O)={5}C2O |
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Structure type: monomer
Compound class: glycoside
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