To determine the IUPAC name:
1. Identify the longest continuous carbon chain, which has 8 carbons (octane).
2. Number the carbon chain to give the substituents the lowest possible locants: - Methyl groups are at positions 2, 5, and 6.
3. Arrange the substituents in alphabetical order and include their positions.
The compound is named : 2,5,6-Trimethyloctane