title: C21H20O9
text: # C21H20O9
  
  The molecular formula $C_{21}H_{20}O_9$ (molar mass: 416.38 g/mol, exact mass: 416.1107 u) may refer to:
  
  * Aleuritin, a coumarinolignoid
  * Daidzin, an isoflavone
  * Puerarin, an isoflavone
  