(4-methoxyphenyl) cyanate

dimethyl 7-oxabicyclo[4.1.0]hept-2-ene-3,6-dicarboxylate

dimethyl 4-oxabicyclo[3.2.0]hept-2-ene-1,5-dicarboxylate

重氮甲烷

α-(4-Carbomethoxyphenoxy)acetophenone