US FDA had granted an orphan drug designation for small cell lung cancer for SNB-101, a new polymer nanoparticle drug under development. SNB-101 is the world’s first nanoparticle anticancer drug that has developed extremely insoluble SN-38 into polymer nanoparticles. It has been approved for phase 1 clinical trials in the US (NCT04640480) and Korea, and the IND for phase 2 has been filed after phase 1 clinical trial in Korea.