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The treatment of acetal A with aqueous acid initially produces unstable compound B, which has a band in its IR spectrum at ~1730 cm-1. However, this compound is only stable at very low temperature. At room temperature, it reacts to form compound C. the IR spectrum of compound C is does not have a band between 1600-1800 cm-1. Suggest reasonable structures for compounds B and C(make sure you clearly indentify these structures in your mechanism), and use arrows to show the detailed mechanism for the formation of B from A and for the formation of C from B.

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