O=C(O)COc1ccccc1C1Nc2ccccc2-c2nnc(SCc3ccc(Cl)cc3)nc2O1
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?