Aspartame (molecular formula C14H18N₂O₅) is a sugar substitute in soft drinks. Under certain conditions, 1 mole of aspartame reacts with 2 moles of water to give 1 mole of aspartic acid (molecular formula C4H7NO4), 1 mole of methanol (molecular formula CH₃OH), and 1 mole of phenylalanine. Determine the molecular formula of phenylalanine.
