COc1ccc(C(=O)NC(=S)Nc2ccc(S(=O)(=O)Nc3cc(C)on3)cc2)cc1OC
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?