33. Xylidiny**, jejich isomery, soli, halogenované a sulfonované deriváty;
Xylidines, their isomers, salts and halogenated and sulphonated derivatives***
33. Xylidiny**, jejich isomery, soli, halogenované a sulfonované deriváty;
Xylidines, their isomers, salts and halogenated and sulphonated derivatives***