S07-2005 racemic is a chemically potent and selective inhibitor of aldo-keto reductase 1C3 (AKR1C3), with an IC50 value of 0.13 μM and 0.75 μM for AKR1C3 and AKR1C4, respectively. Due to its inhibitory properties, it exhibits potential as a chemotherapeutic potentiator, specifically in the context of overcoming drug resistance in cancer [1].