1a) Benzaldehyde	1f) 4-(N,N-Dimethylamino)benzaldehyde
1b) 4-Chlorobenzaldehyde	1g) 4-Methylbenzaldehyde
1c) 2,4-Dichlorobenzaldehyde	1h) Furfural
1d) 3-Nitrobenzaldehyde	1i) Thiophenecarboxaldehyde
1e) 4-Methoxybenzaldehyde	1j) Cyclohexanone