甲醇

二羟基富马酸

重氮甲烷

Diketobernsteinsaeure-dimethylester

(3aS,6aS)-3a,3b,6a,6b-tetramethoxy-2,5-diphenyltetrahydrocyclobuta[1,2-d:3,4-d']bis([1,3,2]dioxaborole)