Digitalonic lactone

The problem of securing crystalline digitalonic lactone is somewhat simpler than is the case with the parent sugar, provided one has Digi-talinum verum, a substance usually commercially available in normal times. The preparation and purification of the glycoside from digitalis seeds has been described by Kiliani. The same worker has provided a method for the isolation of digitalonic lactone which represents a substantial improvement over earlier procedures. 

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