CC1(C)CC(=O)C2=C(C1)N(c1ccccc1)C1(O)C=CC(O)=C3C(=O)c4ccccc4C(=O)C321
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?