CC(C)N1C(=S)SC(C)(C)C1n1oc(=O)n(-c2ccc(Cl)c(Cl)c2)c1=O
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?