NSC194598 is a p53 DNA-binding inhibitor with IC50 value of 180 nM and 2-40 μM for in vitro and in vivo, respectively. NSC194598 interferes with transcriptional activation of mutated RET gene in human medullary thyroid carcinoma TT cells. NSC194598 can be used for acute toxicity to normal tissues by radiation and chemotherapy research[1][2].