Scientists at National Cancer Institute (NCI) Center for Cancer Research (CCR) identified selective tyrosyl-DNA phosphodiesterase 1 (TDP1) inhibitors that may be used in combination with topoisomerase 1 (TOP1) inhibitors for synergistic treatment of solid tumors. NCI seeks research co-development partners and/or licensees for commercializing the TDP1 inhibitors as part of an anti-cancer therapy.