$H-\underset{\stackrel{\mid }{H}}{\stackrel{\underset{\mid }{H}}{C}}-\underset{\stackrel{\mid }{H}}{\stackrel{\underset{\mid }{H}}{C}}-\underset{\stackrel{\mid }{H}}{\stackrel{\underset{\mid }{H}}{C}}-\underset{\stackrel{\mid }{H}}{\stackrel{\underset{\mid }{H}}{C}}-\underset{\stackrel{\mid }{H}}{\stackrel{\underset{\mid }{H}}{C}}-OH$  - pentan-1-ol

$H-\underset{\stackrel{\mid }{H}}{\stackrel{\underset{\mid }{H}}{C}}-\underset{\stackrel{\mid }{H}}{\stackrel{\underset{\mid }{H}}{C}}-\underset{\stackrel{\mid }{H}}{\stackrel{\underset{\mid }{H}}{C}}-\underset{\stackrel{\mid }{O}H}{\stackrel{\underset{\mid }{H}}{C}}-\underset{\stackrel{\mid }{H}}{\stackrel{\underset{\mid }{H}}{C}}-H$  - pentan-2-ol

$H-\underset{\stackrel{\mid }{H}}{\stackrel{\underset{\mid }{H}}{C}}-\underset{\stackrel{\mid }{H}}{\stackrel{\underset{\mid }{H}}{C}}-\underset{\stackrel{\mid }{O}H}{\stackrel{\underset{\mid }{H}}{C}}-\underset{\stackrel{\mid }{H}}{\stackrel{\underset{\mid }{H}}{C}}-\underset{\stackrel{\mid }{H}}{\stackrel{\underset{\mid }{H}}{C}}-H$  - pentan-3-ol

Uzupełniony tekst:

Narysowane cząsteczki mają ten sam wzór sumaryczny, a różnią się tylko położeniem  grupy funkcyjnej . Są one przykładami  izomerów  położeniowych.