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DHARA is an online index of articles on Ayurveda published in research journals worldwide.
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Phytochemistry
2004
May
;
(9)
:0
Antibacterial diterpenes and their fatty acid conjugates from rice leaves.
Kono Y
,
Kojima A
,
Nagai R
,
Watanabe M
,
Kawashima T
,
Onizawa T
,
Teraoka T
,
Watanab M
,
Koshino H
,
Uzawa J
,
Suzuki Y
,
Sakurai A
Abstract
Six structurally oryzalide-related compounds, oryzadione (1), 2, 3, 4, 5 and 6, were isolated from a neutral fraction of the extract of healthy leaves using a bacterial leaf blight-resistant cultivar of a rice plant, "Norin-27", as a group of antimicrobial substances. Their structures were determined by spectroscopic studies to be kaurane analogues and kaurane analogues conjugated with fatty acids, i.e., 1: ent-15,16-epoxy-kauran-2,3-dione (enol form: ent-15,16-epoxy-2-hydroxy-kauran-1-en-3-one), 2: ent-15,16-epoxy-3beta-hydroxy-kauran-2-one, 3: ent-15,16-epoxy-3-oxa-kauran-2-one, 4: ent-15,16-epoxy-3beta-myristoyloxy-kauran-2-one, 5: ent-15,16-epoxy-3alpha-palmitoyloxy-kauran-2-one, and 6: ent-15,16-epoxy-2beta-palmitoyloxy-kauran-2-one.
DHARA ID:
D023154
Pubmed ID:
15184015
Access to Full Paper Not Available
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