O=C1/C(=C/c2ccc(Oc3ccccc3)cc2)N=C(c2ccccc2)N1c1ccc(S(=O)(=O)Nc2nccs2)cc1
A rotatable bond is defined as any single non-ring bond, attached to a non-terminal, non-hydrogen atom. How many bonds in the molecule are rotatable?