Draw the structure of the compound consistent with each of the following IUPAC or common names:
δ-valerolactam

Chemical structure of δ-valerolactam showing a five-membered ring with an amide group.

Chemical structure of δ-valerolactam with a six-membered ring and an amide functional group.

Chemical structure of δ-valerolactam featuring a five-membered ring and an amide bond.

Chemical structure of δ-valerolactam with a six-membered ring and an amide group.

Draw the structure of the compound consistent with each of the following IUPAC or common names:δ-valerolactam