1-Ethyl-6,8-difluoro-7-(4-hydroxyphenyl)-4-quinolone-3-carboxylic acid 103978-08-1 3-Quinolinecarboxylic acid, 1-ethyl-6,8-difluoro-1,4-dihydro-7-(4-hydroxyphenyl)-4-oxo- CP 67804 CP-67,804