So we close this structure to form this ring. Now, in the next step, we have a reduction step, we have an oxidation reduction reaction in which we have this NAD plus that we use to take electrons from these atoms here, from these carbon atoms here. And we essentially form a pi bond between this carbon here and this carbon here. So we generate NADH, we kick off an H ion and we form this six membered molecule known as ortate. So this ring is ultimately going to be used, as we'll see in just a moment, to synthesize that primidine. So once we synthesize the orotate, what do we do next?