# How do we name...(H_3C)_3C-CH_2CH_2CH_2CH_2CH_3?

$\text{2,2-dimethylheptane}$
${\left({H}_{3} C\right)}_{3} C - C {H}_{2} C {H}_{2} C {H}_{2} C {H}_{2} C {H}_{3}$
I think I've got this right. The longest chain is $7 C$ long, substituted at ${C}_{2}$ by two methyl groups.