1-oxido-2-phenylpyrimidin-1-ium

1,4-dimethyl-4H-pyridine-3,5-dicarbaldehyde

1-methyl-4-(dimethoxyethyl)-1,4-dihydropyridine-3,5-dialdehyde

ethyl 2-methoxy-4-pyrazol-1-ylbenzoate

2-(1,3-dioxan-2-yl)acetaldehyde