dimethyl 1,4-dihydropyridine-3,4-dicarboxylate

dimethyl 1-oxidopyridin-1-ium-3,4-dicarboxylate

呋喃并[3,4-c]吡啶-1(3h)-酮

呋喃并[3,4-c]吡啶-3(1H)-酮

(9CI)-3,4-双(氯甲基)-吡啶