title: C21H24O9
text: # C21H24O9
  
  The molecular formula $C_{21}H_{24}O_9$ (molar mass: 420.41 g/mol, exact mass: 420.1420 u) may refer to:
  
  * Isorhapontin, a stilbenoid glucoside
  * Rhaponticin, a stilbenoid glucoside
  