CC12C(=O)N(c3ccc(OC(=O)c4ccco4)cc3)C(=O)C1C1c3ccccc3C2c2ccccc21
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?