CC(C)[C@H](NC(=O)N1CC(=O)Nc2ccccc21)C(=O)N[C@@H](C(=O)O)c1ccccc1
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?