(1,1'-Biphenyl)-4-acetic acid, 2-fluoro-alpha-methyl-, 4-(nitrooxy)butyl ester 158836-71-6 4-(Nitrooxy)butyl 2-fluoro-alpha-methyl-(1,1'-biphenyl)-4-acetate Flurbinitroxybutylester Nitroflurbiprofen Nitroxybutyl flurbiprofen