eFFECTOR Therapeutics, Inc., a clinical-stage biopharmaceutical company, engages in the development of selective translation regulator inhibitors for the treatment of cancer. Its lead product candidate is Tomivosertib, an oral small-molecule inhibitor of MNK that is in phase 2b clinical trial for the treatment of patients with metastatic non-small cell lung cancer. The company is also developing Zotatifin, a small molecule designed to inhibit eukaryotic initiation factor 4A (eIF4E), which is in phase 2clinical trial to treat patients with solid tumors. It has a collaboration agreement with Pfizer Inc. to develop inhibitors of eIF4E. eFFECTOR Therapeutics, Inc. was founded in 2012 and is headquartered in Solana Beach, California.