... 2-Hydroxymethyl-5,6-dimethoxy-p-benzoquinone (XXIIIa) and Its Methyl Ether (XXIIIb)———a) A solu- tion of XIIIb (1.0 g) in MeOH (40 ml) was ... 2350 - Vol. 16 (1968) was recrystallized from cyclohexane to afford pale yellow prisms of XXVI (0.48 g; 20.80%), mp 129~130° (lit. ...