Results 151 to 160 of about 1,544 (162)
Phytochemistry, 2013 Activity guided isolation of a Spiraea prunifolia extract yielded five caffeoyl hemiterpene glycosides: 4'-(6-O-caffeoyl-β-D-glucopyranosyl)-2'-methyl butyric acid, 1-O-caffeoyl-6-O-(4'-hydroxy-2'-methylene-butyroyl)-β-D-glucopyranoside, 1,2-O-dicaffeoyl-6-O-(4'-hydroxy-2'-methylene-butyroyl)-β-D-glucopyranoside, 1-O-caffeoyl-6-O-(4'-caffeoyl-2 ...
Sang Hee Park +7 more
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Hemiterpene Glucosides with Anti-Platelet Aggregation Activities from Ilex pubescens
Journal of Natural Products, 2005 Two new hemiterpene glucosides named pubescenosides A and B were isolated from the root of Ilex pubescens. Their structures were elucidated on the basis of spectroscopic and chemical evidence as 2-(trans-caffeoyloxy)methyl-3-hydroxy-1-butene-4-O-beta-D-glucopyranoside and 2-hydroxymethyl-3-caffeoyloxy-1-butene-4-O-beta-D-glucopyranoside, respectively ...
Zhi‐Hong Jiang +6 more
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Proceedings / Indian Academy of Sciences, 1979 The synthesis of 6-acetyl-2,2-dimethyl-8-methoxychromene (1c), a naturally occurring isomer of encecalin (1a) has been described starting from 2,2,6-trimethyl-8-methoxychromene (2e) which was obtained from creosol (4) in two steps involving condensation of the phenol with malic acid to the coumarin (3), followed by Grignard reaction with CH2MgI.
M. V. NAIDU, G. S. K. RAO
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Phytochemistry, 2006 The bean aphid, Megoura crassicauda Mordvilko, feeds selectively on plants belonging to the genus Vicia (Fabaceae). However, it never infests the tiny vetch, V. hirsuta (L.) Gray. The aphid appeared to discriminate between host and non-host plants by tasting specific chemicals during penetration of its stylet into the plant tissues.
Ohta Naohiro +3 more
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Natural Product Letters, 1995
Abstract (2Z)-4-Hydroxy-2-methyl-2-buten-1-yl-s-D-glucopyranoside 1a and (2Z)-1-Hydroxy-2-methyl-2-buten-4-yl-s-D-glucopyranoside 2a were identified in a glycosidic extract obtained from Riesling grapevine leaves by XAD-2 adsorption and MeOH elution.
Monika Messerer, Peter Winterhalter
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Abstract (2Z)-4-Hydroxy-2-methyl-2-buten-1-yl-s-D-glucopyranoside 1a and (2Z)-1-Hydroxy-2-methyl-2-buten-4-yl-s-D-glucopyranoside 2a were identified in a glycosidic extract obtained from Riesling grapevine leaves by XAD-2 adsorption and MeOH elution.
Monika Messerer, Peter Winterhalter
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