2,3-二甲基-1,3-丁二烯

4-(((2-oxopyridin-1(2H)-yl)oxy)sulfonyl)benzoic acid

2-oxopyridin-1(2H)-yl benzenesulfonate

2-oxopyridin-1(2H)-yl 4-methylbenzene sulfonate

2-氯吡啶