CCOC(=O)C1CCCN(C(=O)c2ccc(NC(=O)CC3SC(N4CCCC4)=NC3=O)cc2)C1
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?