4L6S:
reference: Discovery of novel benzo[b][1,4]oxazin-3(4H)-ones as poly(ADP-ribose)polymerase inhibitors., Gangloff AR, Brown J, de Jong R, Dougan DR, Grimshaw CE, Hixon M, Jennings A, Kamran R, Kiryanov A, O'Connell S, Taylor E, Vu P, Bioorg Med Chem Lett. 2013 Aug 15;23(16):4501-5. doi: 10.1016/j.bmcl.2013.06.055., Epub 2013 Jun 24. PMID: 23850199

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