NCC[C@H](O)C(=O)N[C@H]1C[C@@H](N)[C@@H](O[C@H]2O[C@@H](CN)[C@@H](O)[C@@H](O)[C@@H]2N)[C@@H](O[C@H]2O[C@@H](CO)[C@@H](O)[C@@H]2O)[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?