Drawing and Naming C4H9OH Isomeric Alcohol

[steven10137]

Homework Statement

There is a fourth isomeric alcohol with formula C4H9OH. Draw a structural formula for this isomer and write its systematic name.

The Attempt at a Solution

I am stuck...
This is part of a chemistry lab about the reactivities of isomeric alcohols but I have no idea what this 'fourth isomer' could be.
If anyone could even set me on the right track it would be appreciated

Steven

 

[steven10137]

never mind
It was right under my nose the whole time.
I already had; 1-butanol, 2-butanol and 2-methyl-2-proponal.
The one I was looking for was 2-methyl-1-proponal

Thanks anyways