What is the corresponding structure of the following?
N-ethylhexanamine

Chemical structure of N-ethylhexanamine with an ethyl group attached to a hexane chain.

Chemical structure of hexanamine with an amino group at the end of a hexane chain.

Chemical structure of N-ethylhexanamine with an ethyl group attached to a hexane chain.

Chemical structure of hexanamine with an amino group branching from a hexane chain.

What is the corresponding structure of the following?N-ethylhexanamine