Etodolac is a synthetic nonsteroidal anti-inflammatory drug (NSAID) and selective inhibitor of the cyclooxygenase-2 (COX-2) enzyme. It is primarily used in pharmaceutical research, drug development, and as an active pharmaceutical ingredient (API) for formulations treating osteoarthritis, rheumatoid arthritis, and acute pain. Chemically, it is 1,8-diethyl-1,3,4,9-tetrahydropyrano[3,4-b]indole-1-acetic acid (CAS: 41340-25-4, formula: C₁₇H₂₁NO₃, MW: 287.36 g/mol). Available as a high-purity powder (typically ≥98%), it exhibits anti-inflammatory, analgesic, and antipyretic properties with potentially reduced gastrointestinal risks compared to non-selective NSAIDs. Not intended for direct human consumption; handle with appropriate laboratory safety protocols.