[chemical substances]
   compounds
     Class lipids
       Class glycerides
         1 Class triglycerides [RC(=O)OCH2CH(OC(=O)R)CH2OC(=O)R]
         2 Class 1,2-diglycerides [RC(=O)OCH2CH(OC(=O)R)CH2OR]
         3 Class 1,3-diglycerides [RC(=O)OCH2CH(OR)CH2OC(=O)R]
         4 Class 1-monoglycerides [RC(=O)OCH2CH(OR)CH2OR]
         5 Class 2-monoglycerides [ROCH2CH(OC(=O)R)CH2OR]