structural formula for sucrose:

   H   CH2OH
    \ /
HO   C -- O   H   HOCH2  O    H
  \ /      \ /       \ /   \ /
   C        C -- O -- C     C -- CH2OH
  / \      /          |     |
 H   C -- C -- OH     C --- C -- OH
    / \   |          / \     \    
  HO   H  H        HO   H     H    sucrose
                                   C12H22O11