Medchemexpress, HY-100431A 5mg IMR-1A CAS:331862-41-0 IMR-1A, a acid metabolite of IMR-1, is a Notch inhibitors with an IC50 of 0.5 μM. IMR-1A has a 50-fold increase in potency with respect to IMR-1. IMR-1 can metabolize in vivo to IMR-1A. 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.