tautomerism
given compound is exposed to D2O/OD- for a long time , give the structure of the final product with mechanism

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@Dexter
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The tautomeric hydrogen will be replaced with deuterium
Use this concept here 👇

lowermost carbon ke 5 bonds hai but yes ans aisa hi hai ( without one D)
3D hai ya fir 4D ??
total 4D honge
Something like this ??

exactly this

got it
+solved @Prachi
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