What is the IUPAC name of the given compound?

N-Ethyl-N-Butylethanamine N,N-Diethylbutan-1-amine N-Ethylpentan-2-amine N-Ethylpentan-1-amine

N,N-Diethylbutan-1-amine

This is a tertiary amine with two identical alkyl substituents (ethyl group) and one butyl group which acts as the major chain. The prefix N,N-Di is used for the ethyl groups and this collective group is attached at the first carbon of the butyl group.