So in the first step, we basically have the formation of that shift base. And once these two react, we basically form this molecule. In the process, we actually kick off a water molecule. So these two H ions and this oxygen basically combine to form a water molecule, and we form a double bond between this nitrogen and this carbon here. So this is carbon one, carbon two, carbon 3456 and seven. And so we form a bond between the nitrogen and carbon number two on this incoming ketone substrate molecules.