O=C(c1cnn(-c2ccc(S(=O)(=O)Nc3ccccc3)cc2[N+](=O)[O-])c1)c1cc(F)ccc1O
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?