2,3,24-Trihydroxyolean-12-en-28-oic acid
2α,3α,24-Trihydroxyolean-12-en-28-oic acid, a triterpenoid phytoalexin, isolated from peel of unripe fruits of nectarine (Prunus persica cv Fantasia), shows antifungal activity against the fungus mentioned.
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Phytochemistry, 1999, 52(4):623-9.
Triterpene phytoalexins from nectarine fruits.[Reference:
WebLink]
METHODS AND RESULTS:
Seven triterpenoid phytoalexins were isolated from peel of unripe fruits of nectarine (Prunus persica cv Fantasia) wounded and inoculated with Colletotrichum musae. Two were new triterpenoids, identified as 1β,2α,3α,24-tetrahydroxyurs-12-en-28-oic acid and 1β,2α,3α,24-tetrahydroxyolean-12-en-28-oic acid. 2α,3α,24-Trihydroxyolean-12-en-28-oic acid(2,3,24-Trihydroxyolean-12-en-28-oic acid), 2α,3α,24-trihydroxyurs-12-en-28-oic acid, 2α,3β,24-trihydroxyolean-12-en-28-oic acid, 2α,3α-dihydroxyolean-12-en-28-oic acid, and 2α,3α-dihydroxyurs-12-en-28-oic acid were previously reported as constitutive natural products from other plants, but were never described as phytoalexins.
CONCLUSIONS:
All showed antifungal activity against the fungus mentioned.
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