N=C(N)NS(=O)(=O)c1ccc(NNc2c3ccccc3nc3c(C(=O)Nc4ccc(S(=O)(=O)Nc5ncccn5)cc4)cccc23)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?