COc1ccc(COc2ccc(C3C(S(=O)(=O)c4ccccc4)CON3C)cc2OC)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?