O=C1C2=C(CC3=C(C2)CS(=O)(=O)C3)C(=O)C2=C1CC1=C(C2)CS(=O)(=O)C1
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?