Pyridine series

5,7-Difluoroisatin

5,6-Difluoroisatin

2-Thiopheneglyoxal hydrate

Ethyl 4-methylpyrimidine-5-car

(R)-(-)-1-Phenyl-1,3-ethanedio

3-Methoxythiophene-2-carbaldeh

N-Boc-5-oxo-l-proline

2,4-Bis(trifluoromethyl)benzoi

(1R,4S,5S,6S)-4-[[(2S)-2-Amino

Methyl 2-amino-3,5-dichloroben

elenous acid

Methyl 3-hydroxythiophene-4-ca