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A preliminary investigation of the constituents of Astragalus wootoni. [Beta]-substituted-[Delta][superscript alpha], [superscript Beta]-butenolides of the naphthalene, indene and norcholane series ..
William Standish Knowles
1942
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Delta α, [superscript] butenolides and a suggested revision of the structure of the digitalis-strophanthus cardiac aglycones
Walter Dempsey Paist
1941
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