How many structrual isomers of tertiary amines corresponding to molecular formula `C_(6)H_(15)N` are possible?

Answer

[7]

Explanation

`{:(C=C=C-C-C,,C=C-C=C-C,,),(C=C-C-C=C,,C-C=C=C-C,,),(C=underset(C)underset(|)(C)-C=C,,C=C=underset(C)underset(|)(C)-C,,),(C-=C-C-C-C,,C-C-=C-C-C,,C-=C-overset(C)overset(|)(C)-C):}`