6-Chloroimidazo[2,1-B]thiazole-5-carboxaldehyde23576-84-3100 % similar 6-Chloroimidazo[2,1-B]thiazole23576-81-035 % similar 2,6-Dichloro-3-pyridinecarboxaldehyde55304-73-932 % similar 3-Chloro-pyrazine-2-carbaldehyde121246-96-631 % similar