So we have two categories of isomers, either enantomers or dioisomers. So essentially, if two sugar molecules have the same exact molecular formula and they are not enantomers, then that means they must be diamers. And these are two examples of dioisomers. So if we take a look at diurethrose, this is the same molecule that we basically have here. This. And this is an example of a diary isomer with respect to diurethrows.