Medchemexpress, HY-19903 5mg ASP-9521 CAS:1126084-37-4 ASP-9521 is a potent, selective and orally available AKR1C3 inhibitor with an IC50 of 11 nM for human AKR1C3. 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.