Iptacopan (LNP023) Hydrochloride is a first-in-class, orally administered, potent and highly selective factor B inhibitor with an IC50 of 12 nM and a Kd value of 7.9 nM. Iptacopan exhibits excellent selectivity over other proteases affording IC50s of >30 μM across a panel of 41 human proteases.