Cstone Pharmaceuticals Co. Ltd.’s orally administered Tibsovo (ivosidenib tablets) received the green light from China’s NMPA for use in adult patients with relapsed/refractory acute myeloid leukemia (r/r AML) with a susceptible isocitrate dehydrogenase 1 (IDH1) mutation. It is the first IDH1 inhibitor to reach market in China.