WEE1 and ovarian cancer: No inhibitory activity for the protein kinase and weak activities against K-562, A2780 (human ovarian cancer line), and A2780CisR (cisplatin-resistant human ovarian cancer cells) with IC50 values of 42.0, 28.2, and 154.7 μM, respectively, with cisplatin used as the positive control (IC50 = 7.80, 0.80, and 8.40 μM).