CC1(C)CC(=O)C2=C(C1)O[C@@]1(CCCCN3C(=O)c4ccccc4C3=O)Cc3ccccc3[C@@H]2O1
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?