Medchemexpress, HY-117661 5mg SPHINX31 CAS:1818389-84-2 SPHINX31 is a potent and selective inhibitor of serine/arginine-rich protein kinase 1 (SRPK1) , with an IC 50 of 5.9 nM. SPHINX31 inhibits phosphorylation of serine/arginine-rich splicing factor 1 (SRSF1). SPHINX31 is a potential topical therapeutic for neovascular eye disease [1] . Purity:>98% Medchemexpress has over 10000 novel life-science reagents, reference compounds, APIs and natural compounds for laboratory and scientific use. Other quantity can also be offered.