2-pyridyl-5-(2-pyridylcarbonyl)-tien-2-ylmethanone

2-吡啶基(2-噻吩基)甲酮

2-azidothiophene

dimethyl 2-thiophen-2-ylpropanedioate

dimethyl 2-thiophen-1-ylidenepropanedioate