G1 Therapeutics, Inc. (Nasdaq: GTHX), a clinical-stage oncology company, today announced that the U.S. Food and Drug Administration (FDA) has accepted the New Drug Application (NDA) for trilaciclib for small cell lung cancer (SCLC) patients being treated with chemotherapy and granted Priority Review with a Prescription Drug User Fee Act (PDUFA) action date of February 15, 2021.