Write the IUPAC name of the compound. CH3−CH−CH2−CHO|NH2

The correct IUPAC name is 3-aminobutanal. The parent compound contains 4 C atoms. Hence, it is a derivative of butane. An aldehyde group is present. Hence, the last alphabet 'e' of butane is replaced with 'al' to give butanal. An amino group is present on the third carbon atom.