O=C(OCc1cn([C@@H]2CN(Cc3cccs3)[C@@H](c3ccc(Cl)cc3)C[C@H]2O)nn1)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?