CC1O[C@H](O[C@H](C)CC[C@@H](C)O[C@@H]2OC(C)[C@H](O)CC2O)[C@H](O)C[C@@H]1O
A rotatable bond is defined as any single non-ring bond, attached to a non-terminal, non-hydrogen atom. Amide C-N bonds are not counted because of their high barrier to rotation.  How many rotatable bonds does the molecule have?