3-Fluoro-4-hydroxybenzaldehyde Salicylaldehyde 4-Fluoro-2-hydroxybenzaldehyde 2,6-Difluoro-4-hydroxybenzaldehyde 3-Fluoro-2-methoxybenzaldehyde 3-Fluoro-2-hydroxy-benzoic acid methyl ester 3,5-Difluoro-2-hydroxy-benzoic acid 3 5-Difluorosalicylaldehyde 97 6-bromo-2-fluoro-3-hydroxybenzaldehyde 2-Fluoro-3-hydroxybenzaldehyde