Now, we also have two fatty acids. So fatty acid number one is attached onto carbon number one. Fatty acid number two is attached onto carbon number two. So we see that there's an Esther bond that exists between the oxygen of this carbon and the carbon of that carboxylic acid, of that fatty acid. And notice that these two fatty acids don't have to be the same exact length. So they can have the same number of carbon atoms or they can be different.