1-Naphthalenesulfonic acid
1-(2-Pyridylazo)-2-naphthol
1-Hydroxy-2-naphthoic acid
1-(Chloromethyl)naphthalene
1-Phenyl-1H-tetrazole-5-thiol
1,2,4,5-Benzenetetracarboxylic acid
1,4-dibutoxy-2-chloro-5-nitrobenzene
1,2,4,5-Benzenetetracarboxylic anhydride
1,4-dimethoxy-2-nitrobenzene
1,2,3-Benzotriazin-4(3H)one
1-(3-Chlorophenyl)-3-methyl-2-pyrazolin-5-one
1,2,3,4-Tetrahydroisoquinoline
1-Phenyl-3-pyrazolidinone
1,2-dibromo(phenyl)ethane