2,5-DIMETHOXY-4-CHLOROANILINE

N METHYL ANILINE

BROMAMINE ACID

META PHENYLENE DIAMINE-4-SULPHONIC ACID

MIXED CLEVES ACID

TOBIAS ACID

H ACID

J ACID

K ACID

3,3′-DICHLOROBENZIDINE DIHYDROCHLORIDE（DCB）

1,2-BIS-(O-AMINOPHENOXY)ETHANE