Nc1cc(N)cc(C(=O)OCC(=O)Nc2cc(S(=O)(=O)N3CCCCC3)ccc2Cl)c1
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?