A: IUPAC Name: N-phenylmethanamide
Common Name: N-phenyl formamide
B: IUPAC Name: 2-methylpropanamide
Common Name: isobutyramide
C: IUPAC Name: N-methylbutanamide
Common Name: N-methyl butyramide

A: IUPAC Name: phenylmethanamide
Common Name: phenyl formamide
B: IUPAC Name: 2-methylpropanamide
Common Name: isobutyramide
C: IUPAC Name: methylbutanamide
Common Name: methyl butyramide

A: IUPAC Name: N-phenylmethanoic amide
Common Name: N-phenyl formamide
B: IUPAC Name: 2-methylpropanamide
Common Name: isobutyramide
C: IUPAC Name: N-methylbutanamide
Common Name: N-methyl butyramide

A: IUPAC Name: N-phenylmethanamide
Common Name: N-phenyl formamide
B: IUPAC Name: 2-methylpropanamide
Common Name: isobutyramide
C: IUPAC Name: N-methylbutanamine
Common Name: N-methyl butyl amide