5-Bromopyridine-2-carbaldehyde31181-90-530 % similar 6-Bromopyridine-2-carbaldehyde34160-40-230 % similar 5-Methyl-1,2-oxazole-3-carbaldehyde62254-74-430 % similar Imidazole-2-carboxaldehyde10111-08-730 % similar 3-Thiophenecarboxaldehyde498-62-430 % similar