[chemical substances]
   compounds
     Class imines [RN=CR2]
       2.3.815.3 Class azomethines [RN=CR2 (R≠H)]
       2.3.815.3 Class quinonimines
       2.3.815.3 Class Schiff bases [RN=CR'2 (R≠H)]
       2.5.4.3 Class aldimines [RN=CHR]
       2.5.4.3 Class ketimines [RN=CR'2 (R'≠H)]