Flavoxanthin.

Abstract
The petals of Ranunculus acer contain 4 xanthophylls[long dash]Lutein, xanthophyll [beta] or one identical to it, taraxanthin with probably some viola-xanthin in it and flavoxanthin. The xanthophylls were freed through saponification and repeatedly extracted with benzine and methanol. The separation was done through repeated chromatographic analysis with CaCO3 and benzine.

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