So this is catalyzed by Enoil ACP reductase why? Well, because this molecule here is an Enoil. More specifically, it's a trans delta two Enoil intermediate. And so we take this crotinil molecule and we reduce it to basically remove this double bond and basically form this single bond. And so we see ultimately, when we go from step five to step seven, what we do is we are more specifically when we go from yeah, we can say from step five to step seven, we transform this beta keto group to a methylene group. That's the point of step five through step seven.