Cc1cc(C(=O)N[C@H](c2ccccc2)[C@@]2(C)C[C@@H]2[C@@H](C)C(=O)Nc2ccc3ccccc3c2)n(C)n1
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?