1 4 phenol

1.5 formic acid

2 3 acetic acid

3 4 benzoic acid

3 5 formyl formic acid

* * * 6 zu

PS: 12 combined methanol and solid sodium hydroxide can be mixed to produce sodium methoxide by pumping water, which is an industrial method.

But in high school, this reaction is impossible, because sodium methoxide is more alkaline than sodium hydroxide.