2-[[2-Ethoxy-4-(4-hydroxy-1-piperidinyl)phenyl]amino]-5,11-dihydro-5,11-dimethyl-6H-pyrimido[4,5-b][1,4]benzodiazepin-6-one

XMD8-92 is an ERK5 inhibitor (K_d = 80 nM) that less potently inhibits DCAMKL2, TNK1, and Plk4 (K_ds = 190, 890, and 600 nM, respectively) in a panel of 402 kinases. It blocks ERK5 autophosphorylation, ERK5-mediated phosphorylation of promyelocytic leukemia protein (PML), and PML-dependent activation of p21. XMD8-92 inhibits AP-1 transcriptional activity induced by MEK5-activated ERK5 but not that induced by Cdc37. It inhibits bFGF-induced angiogenesis in a Matrigel^™ plug assay in mice and reduces tumor growth in a HeLa mouse xenograft model when administered at a dose of 50 mg/kg twice per day. XMD8-92 also binds bromodomain-containing protein 4 (BRD4; K_d = 170 nM for BRD4 bromodomain 1).

XMD 8-92, is a BMK1 inhibitor and a highly selective inhibitor of ERK5 activity. XMD8-92 blocks cellular BMK1 activation and significantly suppresses tumor growth in lung and cervical tumor models and is well tolerated in animals.

ChEBI: XMD8-92 is a dimethylpyrimido[4,5-b][1,4]benzodiazepin-6-one carrying at C-2 on the pyrimidine ring a [2-ethoxy-4-(4-hydroxypiperidin-1-yl)phenyl]amino substituent. It is an inhibitor of the BMK1 kinase pathway. It has a role as a protein kinase inhibitor.

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