3-羟基吡啶-4-羧酸乙酯

呋喃并[2,3-c]吡啶-7(6h)-酮

3-acetoxy-4-[2-(trimethylsilyl)ethynyl]pyridine

(1-benzenesulfonyl-1,2,3-6-tetrahydropyridin-4-yl)-acetic acid ethyl ester

ethyl 2-(1-(phenylsulfonyl)piperidin-4-ylidene)acetate