Compound 8 has the formula C4H6Cl2O and is reacted with CH3OH to give compound 9. Compound 9 has the 1H NMR signals 2.1(quintet, .8), 2.5(triplet,.8), 3.6(triplet, .8), 3.7(singlet, 1.2). What is compound 9? What is compound 8? Draw structures and explain your answer please.