A pineapple-smelling ester may be prepared in the laboratory from butanal by means of this reaction scheme. $\text{CH}_3(\text{CH}_2)_2\text{CHO} \xrightarrow{\text{NaBH}_4} X$ $\text{CH}_3(\text{CH}_2)_2\text{CHO} \xrightarrow{\text{Cr}_2\text{O}_7^{2-}/\text{H}^+} Y$ $X$ and $Y$ react together in the presence of concentrated $\text{H}_2\text{SO}_4$ to produce an ester. What is the structural formula for this ester?
- A$\text{CH}_3(\text{CH}_2)_2\text{CO}_2(\text{CH}_2)_2\text{CH}_3$
- B$\text{CH}_3(\text{CH}_2)_2\text{CO}_2(\text{CH}_2)_3\text{CH}_3$
- C$\text{CH}_3(\text{CH}_2)_3\text{CO}_2(\text{CH}_2)_2\text{CH}_3$
- D$\text{CH}_3(\text{CH}_2)_3\text{CO}_2(\text{CH}_2)_3\text{CH}_3$