CN[C@@H](C)C(=O)N[C@H](C(=O)N[C@@H](CCCN)C(=O)Nc1cccc2ccccc12)C(C)C.O=CO
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?