It says to draw the structural formula CH3CH(OH)CH3 on my hw.

What's the parenthesis in the formula?

What you have drawn is the condensed formula. The (OH) is done to show that the OH is connected to the previous C atom and not to the H atom.

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thank you!!!

The parenthesis in the formula CH3CH(OH)CH3 indicate a functional group called a hydroxyl group (OH) attached to the second carbon atom in the chain. The hydroxyl group consists of an oxygen atom bonded to a hydrogen atom (OH). In a structural formula, parentheses are commonly used to enclose a group of atoms that are bonded together within a larger molecule. In this case, the hydroxyl group is attached to the chain of carbon atoms, showing the structure of the organic compound.