The reaction involves bromination of anisole (methoxybenzene). The methoxy group (-OCH₃) is an ortho-para directing activator. Electrophilic aromatic substitution will occur at the ortho and para positions relative to the methoxy group.

Since the molecule is symmetrical, there are two equivalent ortho positions and one para position. Therefore, three distinct monobrominated products are possible: two ortho isomers and one para isomer.

Final Answer: 3