C. Characteristic Groups Containing Carbon, Hydrogen, Oxygen, Nitrogen, Halogen, Sulfur, Selenium, and/or Tellurium
C-4 Carboxylic Acid and Their Derivatives
4.0 Simple Carboxylic Acids
4.1 Hydroxy, Alkoxy and Oxo Acids
4.2 Amino Acids
4.3 Amic acids
4.4 Peroxy Acids
4.5 Imidic, Hydrazonic, and Hydroxamic Acids
4.6 Salts and Esters
4.7 Lactones, Lactides, Lactams, and Lactims
4.8 Acyl Halides
4.9 Acid Anhydrides
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