 So let's try this mechanism now. This is the synthesis of an aster from a carboxylic acid, okay? You notice there's a two, it's a two-step reaction. First step is going to deprotonate the carboxylic acid, of course, right? And then that's going to give you a nucleophile, okay? And then that nucleophile is going to perform an SN2 reaction on the methyl iodide, okay? So if you don't remember your SN2 reactions, backside attack, right, then you won't be able to do this mechanism, okay? So let's, so first step, sodium hydroxide, sodium, of course, there's the spectator ion, ain't doing anything, OH minus, that's going to deprotonate the carboxylic acid. If you wanted to push those arrows up there, that'd be fine too. The resonance structures of each other. Remember deprotonations, that's back and forth, but this case, it's going to be very far that way, okay? If you're wondering how I figured that out, I did that calculation that we learned the other day in my head, okay? Okay, so, what we're going to do, now we have what we call the carboxylate ion, and we also made water. That's not going to do anything by itself. So we're going to have to add something else to it. So, second step, now we're adding methyl iodide. So, methyl iodide comes in, tertiary, right, so SN2, right, good nucleophile, too. So, it's going to see the backside of this thing, and it's going to attack, okay? And the leading group off. So this is a nucleophilic substitution, bimolecular, right, so it all happens in one step. Bimolecular nucleophilic substitution, that's how you read this. Let's just finish the reaction here, and then plus your I minus. You'll actually see sodium iodide, because you're going to be doing this in organic media, you know? So, usually, ion compounds don't dissolve very well in organic media, you know? So you can actually see the sodium iodide coming out of solution. Is everybody cool with that? Very fast reaction, too. Once you add that methyl iodide, you know, you start adding it, adding it, you'll see that stuff drop out, really straightforward, I guess. No questions.