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Molluscicidal saponins from a Zimbabwean strain of Phytolacca dodecandra

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Three new monodesmosidic saponins, all glycosides of 2 beta-hydroxyoleanolic acid, were isolated from an aqueous extract of a Zimbabwean strain of Phytolacca dodecandra. Their structures were, mainly by spectroscopic methods (LSIMS, H-1 NMR, COSY, NOESY, TOCSY, J-resolved (1)HNMR, (13)CNMR, HETCOR), established as 3-O-[2',4'-di-O-(beta-D-glucopyranosyl)-beta-D-glucopyranosyl]2 beta-hydroxyoleanolic acid, 3-OO-alpha-L-rhamnopyranosyl-(1-->2)-O-[beta-D-galactopyranosyl- (1-->3)]-beta-D-glucopyranosyl 2 beta-hydroxyoleanolic acid and 3-O-[3'-O-(beta-D-galactopyranosyl)-beta-D-glucopyranosyl] 2 beta-hydroxyoleanolic acid. Two of the saponins were submitted to a preliminary screening for molluscicidal activity against the schistosomiasis transmitting snail Biomphalaria glabrata and showed, respectively, strong and weak activity. In addition, four saponins previously reported from other strains of Phytolacca dodecandra were identified.
OriginalsprogUdefineret/Ukendt
TidsskriftPhytochemistry
Vol/bind36
Udgave nummer3
Sider (fra-til)753-759
Antal sider7
ISSN0031-9422
StatusUdgivet - 1994

    Forskningsområder

  • phytolacca dodecandra phytolaccaceae zimbabwean strain molluscicides triterpene saponins 2-hydroxyoleanolic acid oleanolic acid hemolytic activity lherit

ID: 38062315