Abstract
A sapogenin (C29H44O4) is obtained from ripe seed of Agrostemma githago. It is called githagenin and is an oxy-oxo-lac-tone. Oxidation with chromic acid at 70-80[degree] gives a diketo- lactone- mono-carboxylic acid (C29H42O6). By the formation of githagenic acid it is concluded that the hydroxyl and ketone groups occur in the same hydrogenated ring and apparently in the a- or B-position. Githagenin is closely related to chamellia-end-sapogenin and to the endsapogenin of quillaic acid.

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