O=C1NC(=O)/C(=C/c2ccc(OS(=O)(=O)c3ccc(F)cc3F)cc2)N1
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?