 So let's try this one, yet again, says calculate the units of in saturation for a protezinic acid, an anti-inflammatory medication. And then it gives its molecular formula as C17H17NO3P. So what's the first thing that we have to do guys? Help me out. We got to find the base. The base formula, and how do we do that? It's the 2N plus 2 formula. Yeah, it's the CNH2N plus 2 formula. And what does this formula tell us guys? What does this formula indicate? Everybody should tell me because we just went over it. Remember we turned off the video to talk about this? What type of alkane should be? What type of alkane? Non-cyclic or acyclic alkane. So is this an alkane? Let's see if we can get it right. No. No, how do we know it's not? And carbons, right? So it's got other atoms in it, it can't be an alkane, right? So we've got to figure out, well, how do we get this down to this base formula? So what do we do with nitrogens? Do you guys remember? Subtract. Subtract one. Subtract one. And oxygens? Nothing. And sulfurs? Nothing. Nothing. They're in the same group as oxygen. Okay. So what's our base formula now? So C17H16. Okay. Do you think that's going to fit into the formula for an acyclic alkane? So what would it be if it were, if it fit that formula? The same as that? No. So did it fit the base formula? No. Now, any units of exaggeration this thing has? Subtract. Subtract. So what do I got? H20, thank you. So how many units do I have? Units of exaggeration. I was in 36 because 16 was 32. So did you get 36? Yeah. Is that a 34? Two plus two. 16 is 16 is 32. Yeah. Plus two is 34. Oh, I did 17. That's all right. Okay. Sorry, sorry. Calculator wrong. Everybody's got their calculator when I did it.