2-氨基吡啶

3-己炔-2,5-二醇

5-羟甲基糠醛

4c-(5-methyl-3-phenyl-[1,4,2]dioxazol-5-yl)-but-3-en-2-one

4t-(5-methyl-3-phenyl-[1,4,2]dioxazol-5-yl)-but-3-en-2-one