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A carbonyl compound P, which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to give an olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergoes intra-molecular aldol reaction to give predominantly S. The structure of the carbonyl compound P, is

Answer» A carbonyl compound P, which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to give an olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergoes intra-molecular aldol reaction to give predominantly S.

The structure of the carbonyl compound P, is


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