 Yes, exactly cool. Okay, so the name of this compound the common name of this compound is Norbarnian, okay, so hopefully you can see this is a compound of fused rings, right? So we were talking about last time a couple of different types of fused ring types of compounds one of them was a spiro cycle the other one was bicycle, right? Which one would this one be? Okay, yeah, so norbarnian is that the IUPAC name for this molecule? No, okay, so It's a bicyclo, right? So What is the actual name of this molecule can anybody tell me? Okay, so let's start by cycle. That's where we start, right? By cyclo and then Okay, so we got to put the brackets, right? So bracket and then what'd you say? One it's one and then Okay, so let's write that down and Then let's look at where we got that. Okay, so it's by cycle. Oh, why how can we see that because? Two carbons are connecting the two rings remember the spiro cycles are only connected by the one part, okay? The two to one, right? So we have to go from big to small with the numbers and where do those numbers come from well when we look at the rings here, right? So Those are what we call the bridgehead carbons there, okay? When we look at the bridgehead carbons from there, we look and see there's two carbons there on one side, right? Two carbons on the other side and one carbon in the middle, okay? So all the connecting pieces to those bridgehead carbons essentially, okay? So in other words right from this bridgehead to this bridgehead we can go one two and then there, okay? One two and then there and then one and then there that's where we get these two two one, okay? And then the heptane hopefully y'all can see right. It's a different number in scheme one two three four five six Seven, okay, so since there's seven carbons. It's a heptane Any questions on that one? So just like that, okay? Just do it just exactly like that, okay? Any other questions? Wonderful