Can someone tell me what these parenthesis mean?

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The discussion revolves around interpreting the organic molecule notation (CH₃)₃CCH₂CH(CH₃)CH₂CH₂CH₃. The parenthesis indicates that the methyl group (CH₃) is repeated three times, forming a tert-butyl group attached to a carbon chain. The second set of parentheses denotes a separate methyl group attached to the adjacent carbon atom. There is confusion about whether the molecule is 2,2,4-trimethylheptane or octane, but the explanation clarifies the structure. Understanding the notation is crucial for accurately identifying the compound's name and structure.
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Homework Statement



Draw this organic molecule (CH₃)₃CCH₂CH(CH₃)CH₂CH₂CH₃




The Attempt at a Solution



My smart friend tells me it is 2,2,4-trimethylheptane.

But I counted and I got octane, what does the parenthesis mean??
 
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(CH₃)₃CCH₂CH(CH₃)CH₂CH₂CH₃

The first paranthesis means the group in parenthesis is repeated the number of times in the subscript, the second set mean that the group is separate and attached to the atom next to it.
 

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