The IUPAC name for ${\text{ CH}}_{\text{3}}{\text{-CH}}_{\text{2}}{\text{ - CH(OH) - CH = CH}}_{\text{2}}$

Pent-1-ene-3-ol

Structure:

• Double bond at carbon 1 (alkene).

• Hydroxyl group (–OH) at carbon 3.

• Five carbon chain (pent).