O=C(CCNS(=O)(=O)c1ccc2c(c1)CCN2C(=O)C1CC1)N1CCN(c2cccc(Cl)c2)CC1
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?