Besset, Tatiana, et al. “Preparation and Evaluation of a Set of bis(methoxycarbonylmethylthio) Heteroquinones As CDC25B Phosphatase Inhibitors”. European Journal of Chemistry, vol. 2, no. 4, Dec. 2011, pp. 433-40, doi:10.5155/eurjchem.2.4.433-440.400.