And what that means is this is a saturated fatty acid. Saturated basically means this hydrocarbon chain contains a maximum number of hydrogen atoms. Now, as we add double bonds, that decreases the hydrogen count along this backbone, and that makes the fatty acid unsaturated. So unsaturated means we have double bonds. Now, monounsaturated basically means we have one double bond in that hydrocarbon chain. If we're polyunsaturated, that means we have two or more of these double bonds.