Acetaldehyde Is Reacted with Excess Methanol in Acid $\delta$ (Doublet,3H)
3 $\delta$

question 2

Essay

Acetaldehyde is reacted with excess methanol in acid.The product was isolated and gave the following ¹H NMR spectroscopic data:
1.3 $\delta$ (doublet,3H)
3.4 $\delta$ (singlet,6H)
4.6 $\delta$ (quartet,1H)
Propose a structure consistent with this information.

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