CC(=O)C1=C(C)CC2(CC1)C(=O)C(Cc1ccccc1)N(Cc1ccccc1)S2(=O)=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?