organic compounds see [unranked] chemical compounds
   Class carbohydrates [Cn(H2O)n, etc.]
     1 Class monosaccharides - sugars
     2.1 Class alditols [HOCH2[CH(OH)]nCH2OH]
     2.2 Class inositols [~[CHOR]6~]
     3.1 Class aldonic acids [HOCH2[CH(OH)]nC(=O)OH]
     3.2 Class uronic acids
     3.3 Class aldaric acids [HOC(=O)[CH(OH)]nC(=O)OH]