COc1ccc(N2C(S)=NC3c4cc(Cl)ccc4OC2(C)C3C(=O)N(C)C)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?