The signals at δ 1.24 (t, 3H) and 4.10 (qt, 2H) are a typical ethyl pattern. The chemical shift of the CH₂ indicates it is attached to a heteroatom. The methyl singlet, δ 2.02 (s, 3H), is adjacent to a carbonyl group.

The signal at 170.8 ppm is weak (no hydrogens attached) and is in the range for an ester carbonyl. The signal at 60.3 ppm is a carbon attached to a heteroatom. The carbon of the methyl group attached to the carbonyl carbon is deshielded (20.8 ppm) relative to the methyl carbon at 14.1 ppm. The small triplet at 77.6 ppm is DCCl₃. Return to Menu.