$CH_3-CH_2-CH_2-CH_2-CH_2OH$: pentan-1-ol
$CH_3-CH(OH)-CH_2-CH_2-CH_3$: pentan-2-ol
$CH_3-CH_2-CH(OH)-CH_2-CH_3$: pentan-3-ol
$CH_3-CH(CH_3)-CH_2-CH_2OH$: 3-metylbutan-1-ol
$CH_3-CH(CH_3)-CH(CH_3)OH$: 3-metylbutan-2-ol
$CH_3-C(OH)(CH_3)-CH_2-CH_3$: 2-metylbutan-2-ol
$CH_2OH-CH(CH_3)-CH_2-CH_3$: 2-metylbutan-1-ol
$(CH_3)_3C-CH_2-OH$: 2,2-đimetylpropan-1-ol