H2C=CHCHO common name
Acrolein
CH3CH=CHCHO Common name
Crotonaldehyde
Benzaldehyde
Formaldehyde systematic name
Methanal
Acetaldehyde systematic name
Ethanal
Acrolein systematic name
Propenal
Crotonaldehyde systematic name
2-butenal
Benzaldehyde systematic name
Benzenecarbaldehyde
Acetone
Acetophenone
Benzophenone
term use if -COR group acts as a substituent
Acyl group
COCH3
CHO
is an aroyl group
COAr
COC6H5
an acyl group
Benzoyl
Formyl
Acetyl