Compound A exhibits two signals in its H1 NMR spectrum at 2.64 and 3.69 ppm, and the ratio of the absorbing signals is 2:3. Compound B exhibits two signals in its H1 NMR spectrum at 2.09 and 4.27 ppm, and the ratio of the absorbing signals is 3:2. Which compound corresponds to dimethyl succinate, and which compound corresponds to ethylene diacetate?
