O=S(=O)(c1ccc(/N=C2\NC(c3ccc(O)cc3)(c3ccccc3O)c3ccccc32)cc1)c1ccc(/N=C2/NC(c3ccc(O)cc3)(c3ccccc3O)c3ccccc32)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?