O=C(Oc1c(Cl)cc(C2(c3cc(Cl)c(OC(=O)c4ccccc4)c(Cl)c3)CCCCC2)cc1Cl)c1ccccc1
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?