 One of the things that I think it's really important for you to do is to start when you're looking at the model kits, take a model that you can start with and see what you need to do to turn it into the next one. So this was one that we looked at in a previous slide. This is pentane amine. So this is the amine group because the nitrogen and two hydrogens are attached to a carbon that's only attached to hydrogens. But therefore, to turn it into an amide, I'm going to need to remove both of those hydrogens and I'm going to need to use one of my little bendies in order to allow me to create a double bond I need to attach the oxygen. And when I do this, I will end up with an amide group and this is the only difference between an amine and an amide. The same molecule that you've already looked at previously, let me just orient it so you can see it. So again, we have one, two, three, four, five, so there are five carbons in this chain. You can see this time the functional group is a CON group. It's a con. CON is our carbon double bonded oxygen and our nitrogen. This together is what is forming our amide functional group. Just as we looked at for the amines, you can have methyl or ethyl groups attached somewhere along the chain, either to the carbons or to the nitrogen. And again, we would name them the same way. We would give a number for which carbon they were off, starting with number one being our carbon double bonded to an oxygen and we would give it an N if the side chain was attached to the nitrogen. And of course, you can have an N comma N if you have two methyl groups attached here and here. It's getting pretty complex, but at this point in time, in our initial study of nomenclature, this is almost the last group that we need to look at, just one more and we'll at least have covered most of the key functional groups for nomenclature. Thanks for watching.