Phytoecdysones of serratula II. Viticosterone E from Serratula sogdiana and its partial synthesis
1. A phytoecdysone identified as viticosterone E has been isolated from a methanolic extract of the leaves ofSerratula sogdiana Bge.
2. A partial synthesis of viticoste rone E from ecdysterone has been effected by two methods — via the 2,3: 20,22-diacetonide and via the 2,3,22,25-tetraacetate.
KeywordsAcetic Anhydride Tetraacetate Sodium Bicarbonate Solution Sodium Periodate Isopropylidene
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