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FLUORESCENT BRIGHTENER OB-1
FISCHER’S ALDEHYDE
SALICYLADEHYDE
3-HYDROXY-2-METHYL-4-QUINOLINECARBOXYLIC ACID
QUINALDINE
BENZOGUANAMINE
N,N-DIMETHYLFORMAMIDE(DMF)
2,4,6-TRIMETHYLANILINE
1,8-NAPHTHALIC ANHYDRIDE