O=C1C2C3C=CC([C@@H]2C(=O)N1C1CCCCC1)[C@H]1C(=O)N(C2CCCCC2)C(=O)C31
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?