This disclosure relates to the uses of compounds that target an interaction between CHFR and PARP1. In certain embodiments, the disclosure relate to treating cancer by administering a mitotic inhibitor such as a taxane and a vinca alkaloid in combination with a compound that inhibits CHFR and PARP1 interactions, such as 5-((1-benzyl-1H-indol-3-yl)methylene)-1-(3,4-dimethylphenyl)pyrimidine-2,4,6(1H,3H,5H)-trione, derivatives or salts thereof, optionally in further combination with a third anti-cancer agent.