IDO1 TDO-IN-1 (30) is a highly effective inhibitor that targets both IDO1 and TDO enzymes with uncompetitive (Ki = 0.23 μM) and competitive (Ki = 0.73 μM) mechanisms, respectively. This compound, IDO1 TDO-IN-1 (30), exhibits a significant capacity to induce cell apoptosis via the potential mitochondria-mediated Bcl-2 Bax pathway [1].