CN(C)CCN(C)P12(Oc3ccccc3O1)Oc1c(Cl)c(Cl)c(Cl)c(Cl)c1O2
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?