[Studies on benzo-heterocyclic compounds. VI. Studies on the synthesis of benzoxazolinone and benzoxazinone derivatives. 4. The synthesis of Mannich base of 2-benzoxazolinones and their quarternary ammonium salts].
D001583:Benzoxazoles / Q000138:chemical synthesis*; D005557:Formaldehyde; D000644:Quaternary Ammonium Compounds / Q000138:chemical synthesis*
D001583:Benzoxazoles; D000644:Quaternary Ammonium Compounds; D005557:Formaldehyde