Didnt you kind of already draw the structure? R-CH2=NH?
Pentavalent carbon?
I am a bit of a pedant for removing explicit hydrogens in chemical structures. I don't really like to see CH
3 at the end of a chain. Not that there is anything wrong with it but when you have a C
18 n-alkane I think they look out of place.
I thought that perhaps this guys prof was like me and wanted an expanded structure that looked tidy.