Notes: rac-trans-4-hydroxy Glyburide is an active metabolite of the SUR1/Kir6.2 sulfonylurea inhibitor glyburide (Item No. 15009).{60355,60356} It is formed from glyburide by the cytochrome P450 (CYP) isoforms CYP2C8 and CYP2C9.{60355} rac-trans-4-hydroxy Glyburide inhibits glyburide binding to rat brain synaptosomes at the high and low affinity sites of SUR1/Kir6.2 with IC50 values of 0.95 and 100 nM, respectively.{60356}