ALK2-IN-4 succinate is a potent ALK2 inhibitor extracted from patent WO2020086963A1, compound Formula I free base.

JL5 is a novel potent, selective BMP receptor inhibitor with IC50 of 1, <5 and 2 nM for ALK2/ACVR1, ALK3/BMPR1A and ALK6/BMPR1B, respectively.

LSKL, Inhibitor of Thrombospondin (TSP-1) TFA is a latency-associated protein (LAP)-TGFβ derived tetrapeptide and a competitive TGF-β1 antagonist. LSKL, Inhibitor of Thrombospondin (TSP-1) TFA inhibits the binding of TSP-1 to LAP and alleviates renal interstitial fibrosis and hepatic fibrosis. LSKL, Inhibitor of Thrombospondin (TSP-1) TFA suppresses subarachnoid fibrosis via inhibition of TSP-1-mediated TGF-β1 activity, prevents the development of chronic hydrocephalus and improves long-term neurocognitive defects following subarachnoid hemorrhage (SAH). LSKL, Inhibitor of Thrombospondin (TSP-1) TFA can readily crosse the blood-brain barrier.

TGFBR1-IN-1 is an ALK5 inhibitor extracted from patent WO2018004290A1, Compound 33, has an IC50 of 10-100 nM.

LY2109761 is a novel selective TGF-β receptor type I/II (TβRI/II) dual inhibitor with Ki of 38 nM and 300 nM, respectively; shown to negatively affect the phosphorylation of Smad2.