2-[2-[(E)-2-[4-(dimethylamino)phenyl]ethenyl]-6-methylpyran-4-ylidene]propanedinitrile

2-哌啶甲酸

4-硝基苯乙烯

tert-butyl (4-nitrobenzoyl)carbamate

(1α,2α,6α)-7-Oxabicyclo[4.1.0]hept-3-en-2-ol-(4-nitrobenzoat)