Pyridine series

(R)-(+)-2-Chloropropionic acid

6-hydroxypyridazine-3-carboxyl

3-Isoxazolecarboxylicacid, eth

 5-Methylpyrazin-2-amine

4-Chloro-6-methylpyrimidine 

Ethanone, 1-(3,5-dimethylpheny

zinc trifluoromethanesulphonat

5-Bromothiophene-3-carbaldehyd