ldn193189 ldn193189 ldn193189 is a chemical compound used in the study of bone morphogenetic protein signalling through the alk2, alk3 and alk6 receptors. it has been researched for the treatment of fibrodysplasia ossificans progressiva. ldn193189 names preferred iupac name 4-quinoline identifiers cas number 1062368-24-4 y 3d model (jsmol) interactive image pubchem cid 25195294 unii w69h5yqu9o y comptox dashboard (epa) dtxsid30147553 inchi inchi=1s/c25h22n6/c1-2-4-24-22(3-1)21(9-10-27-24)23-16-29-31-17-19(15-28-25(23)31)18-5-7-20(8-6-18)30-13-11-26-12-14-30/h1-10,15-17,26h,11-14h2key: cdovnwnanfflfj-uhfffaoysa-n smiles c1(c2=c3n=cc(c4=cc=c(n5ccncc5)c=c4)=cn3n=c2)=cc=nc6=cc=cc=c16 properties chemical formula c25h22n6 molar mass 406.493 g·mol−1 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). infobox references