Medchemexpress, HY-11030A 5mg SNT-207858 (free base) CAS:1104662-66-9 SNT207858 free base is a selective, blood brain barrier penetrating, potent and orally active melanocortin-4 (MC-4) receptor antagonist. SNT207858 free base has an IC50 of 22 nM (binding) and 11 nM (function) on the MC-4 receptor. 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.