(2’S, 3’R)-Cabazitaxel-D3 is a labelled analogue of (2’S, 3’R)-Cabazitaxel (C046505). (2’S, 3’R)-Cabazitaxel (C046505) is a stereoisomer of Cabazitaxel (C046500), a novel tubulin binding taxane, that acts as a second-line treatment for those with castration-resistant prostate cancer.