5-Methoxy-7-Methyl-t-boc-1H-indole-4-carbaldehyde CAS 1481631-51-9 is the intermediate of Iptacopan and also known by the brand name Fabhalta, is a prescription medication used to treat paroxysmal nocturnal hemoglobinuria (PNH) in adults. It is a complement factor B inhibitor that is taken orally.