Cyclo-isopropylidene dibromomalonate

Ethyl 5-hydroxyindole-2-carboxylate

Ethyl 3-ethoxy-3-iminopropionate hydrochloride

4-Hydroxy-2-methylbenzaldehyde

4-Chloro-2-nitrobenzaldehyde

4-tert-Butylsalicylaldehy

2-Amino-5-chlorobenzaldehyde