O=C1C2Sc3nc(O)sc3C(c3ccccc3)C2C(=O)N1c1ccc(Cl)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?