The compound with the formula CH3C≡CCH2CH2CH3 has the following IUPAC name:

1-Hexyne

Here's how we arrive at the name:

* Longest Chain: The longest continuous carbon chain contains six carbons, making it a hexane derivative.

* Triple Bond: The presence of a triple bond indicates it is an alkyne.

* Position of Triple Bond: The triple bond is located at the first carbon, so it's a 1-yne.

Therefore, the name is 1-Hexyne.