Optimizing a drug candidate, even when demonstrating strong efficacy, can be a challenge when metabolites may be involved in creating the intended therapeutic effect. VeriSIM Life’s client needed to confirm their compound’s efficacy as direct or indirect and determine their best path forward for developing a novel cancer therapy. BIOiSIM confirmed a metabolite-driven mechanism of action, identified a range of efficacious metabolites, and ranked them based on both potency and safety.