 Okay, so let's try this one, Rene. So, um, osmium tetroxide, whenever you see this, and you see an alkene, whenever you see an osmium tetroxide, that thing's gonna, yeah, make a diol out of the alkene, okay? And in fact, whenever you have an alkene, just like the last problem we were talking about, you've got these carbons being sp2 centers, right? So the thing can attack from the top or the bottom, you know? This particular one's going to want to attack from the bottom more because of this... Breachhead. Yeah, this Breachhead carbon, and that provides steric hindrance to something coming that way, so it's not going to do it, right? So, um, I mean, so you're thinking that the major product of this is going to be the diol from the bottom, right? So, um, how do you do that? Remember, this is actually a conservative reaction, okay? It's like those, um, uh, pericyclic reactions that we had talked about later, you know? But now that you know about them, you can think about them in this sort of way. So let's draw Osmium tetroxide. Well, that's what it looks like, okay? It's unlike potassium permanganated, uh, uncharged, okay? So, um, what'll happen is, again, this is a concerted reaction, so pericyclic, it'll...all the bonds form and break at the exact same time. So, what I like to do is take that... Yeah, let's just draw a little bit better. And then this bond, this is weird because you don't usually see things attacking oxygens, but with the last two mechanisms that we've done, things have been attacking oxygens, right? And then that bond goes there, okay? Now you've got this intermediate. Again, this is concerted. And you don't need to know the second step mechanism. So this is kind of an intermediate, right? Or, uh, uh, intermediate for the reaction. And what this sodium bisulfite does is kind of reduce this Osmonium intermediate, you know? So it'll kind of, if you can effectively say, just break those bonds there, okay? So it's going to reduce it, right? So reducing means to add hydrogen to it, right? So for this, um, you don't need to know any mechanism. If you see something like that, that just means reduction. What is that called? Standard hydroxylation. Yeah, well, it's a syn-dial. Yeah. And the reaction is, like René just said, syn-dial hydroxylation. So, again, need to know the mechanism? If you need to know the mechanism, just reduce it, okay? So this, in fact, is oxidizing that thing, right? Because if you add oxygen to it. Yeah, oxidizing. Okay. Is everybody cool with that? Yeah. Okay, cool.