Hydrolysis of a compound A in dilute aqueous hydrochloric acid gave (along with methanol) a compound B,

Question:

Hydrolysis of a compound A in dilute aqueous hydrochloric acid gave (along with methanol) a compound B, mp 164-165°C. Compound B had the molecular formula C16H16O4; it exhibited hydroxyl absorption in its infrared spectrum at 3550 cm-1 but had no peaks in the carbonyl region. What is a reasonable structure for compound B?