Prexasertib Mesylate Hydrate (LY2606368 Mesylate Hydrate) is an ATP-competitive, selective, second generation cell cycle detection site kinase 1 (CHK1) inhibitor (IC50<1 nM, Ki: 0.9 nM). Prexasertib Mesylate Hydrate inhibits CHK2 (IC50: 8 nM) and RSK1 (IC50: 9 nM). prexasertib Mesylate Hydrate causes double-stranded DNA breaks and replication mutations, induces apoptosis and exhibits potent anti-tumour effects.

Chk1:0.9 nM (Ki), Chk2:8 nM, Chk1:<1 nM