Consider the given 1H NMR spectrum, including TMS as reference, of a compound with a formula of C 9 H 11 B r O . Proton NMR spectrum with single TMS peak at 0 ppm, quintet centered around 2 ppm, a triplet at 3.15 ppm, a triplet at 3.65 ppm, two complex peaks around 7 ppm, and a triplet at 7.3 ppm. A closer view of the upfield signals is also available. Close up view of the proton NMR clearly showing quintet near 2 ppm, triplet at 3.15 ppm, and triplet at 3.65 ppm. What is the structure of the compound