# How would you name: CH_3CH_2(OH)C_2CH_2CH_3?

The section $\ldots . \left(O H\right) {C}_{2} C {H}_{2.} . .$ cannot be correct. There is a carbon atom there which appears to have nothing bonded to it except another carbon!
Should it be $\ldots . \left(O H\right) C H C {H}_{2.} . .$? If so, then the product would be 2-butanol.