the need for a nonsteroidal anti-inflammatory agent effective in rheumatoid arthritis , osteoarthritis , gout , ankylosing spondylitis and related diseases with reduced side effects when compared to existing drugs led us to develop naproxen : d-2- ( 6'-methoxy-2'-naphthyl ) -propionic acid .
C0038013
ankylosing spondylitis
C0027396
naproxen