G1 Therapeutics Inc is a commercial-stage biopharmaceutical company. It is engaged in developing novel, small-molecule therapies to target unmet needs in the treatment of cancer. The firm is developing drugs that have the potential to treat the types of cancer, such as cell lung cancer and breast cancer, and designs them to combine and enhance the anti-tumor activity of current therapies. Its product COSELA indicates to help protect bone marrow from the damage of chemotherapy.