O=c1c2cc(S(=O)(=O)O)ccc2nc(COc2ccc(Oc3ccc(Cl)cc3Cl)cc2)n1-c1ccc(Cl)cc1Oc1c(Cl)cccc1Cl
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?