Common naming with Nitrogen

[Therese Abely 3A]

For chapter 2 number 35, it had a line structure of N with a methyl, ethyl, and propyl coming off of it. I was just wondering why the common name is N-ethyl-N-methyl-N-propyl amine? Why does propane turn into a propyl? Doesn't there have to be a main carbon chain even in common names?

Thanks!

[Jonathan Browne 2A]

The solution in the orange Organic Chemistry book is N-ethyl-N-methylpropan-1-amine, and this is found at the bottom of page 217. I believe you may have accidently misread the solution. In this case, the parent chain is the propan-1-amine, because it has 3 carbons in the chain and one is connected to a Nitrogen creating an amine functional group. The ethyl and methyl have "N-" in front of them because they are substitutes connected to the Nitrogen.