Description
β-Glucuronide-NB-bis[N(Me)-methyl ester]-MMAE (compound 20) is auristatins-glucuronide conjugate. Antitumor agent-122 shows in vitro antiproliferative activities against β-glucuronidase pretreated and untreated cancer cells with an IC50 value of 5.7 nM - 9.7 nM. Antitumor agent-122 shows potent antitumor efficacy in HCT-116 xenograft mouse model without inducing side effects