CS(=O)(=O)N(Cc1cccc(CN(C(C(=O)O)c2ccccc2)S(C)(=O)=O)c1)C(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?