Pyridine series

6-BROMO VERATRALDEHYDE

2-BROMO-5-NITRO BENZALDEHYDE

3-METHYL-1H-1,2,4-TRIAZOLE

1-nitropyrazole 

3-Amino-5-bromobenzoic acid

2,2,2-Trifluoroethyl trifluoro

6-Chloroindole-2-carboxylic ac