[chemical substances]
   compounds
     Class carbohydrates [Cn(H2O)n, etc.]
       01 Class saccharides
       01.08 Class alditols [HOCH2[CH(OH)]nCH2OH]
       33.1 Class C-glycosyl compounds [glycosyl-hydrocarbyl]
       33.1 Class glycosides [glycosyl-OR, -SR, -SeR, etc.]
       33.1 Class glycosylamines [glycosyl-NR2]