Hey, guys, let's take a look at the following questions Dealing with nomenclature for benzene rings. So hereafter bright provide the structure of the following aromatic hydrocarbons. So benzene now here it says, P Ethel tal you in here Stand p stands for Pera. Para just means you're to substitue. It's on carbons one and four here. If I had em and would be meta, which would mean my two substitutes on carbons one and three. And if I saw Oh, I wouldn't mean Ortho where my to substitute wants on carbons one and two on benzene. So we know we have benzene. We know there's an ethyl involved. You can say that this is 123 and this will be four if you want Ethel, it's ch two ch three. But what is tell you ing me? We'll tell you it is the common name for when benzene has on it. A methyl group. Okay, so tie you in is benzene with a method. So this would represent pere Ethel Towey, where the methyl and the Ethel armed positions one and four Remember, Para means 14 Ortho means 12 meta means Now that you know the hang of that. See if you can answer this question here. This one here is Metta Bruno Ben's OIC acid. And look at the name OIC acid. What functional group you think is on benzene here?