dimethyl 2-syn-phenyl-2-phosphabicyclo[2.2.2]oct-5-ene-7,8-dicarboxylate

吡咯

dimethyl 7-azabicyclo<4.2.0>octa-2,4-dien-8-one-4,5-dicarboxylate

dimethyl 7-methyl-7-azabicyclo(4.2.0)octa-2,4-dien-8-one-4,5-dicarboxylate

1-(trimethylsiloxy)-1,3-butadiene