Cc1ccc(S(=O)(=O)N(c2cc(Cl)c(O)c(Cl)c2)P(=O)(OC(C)C)OC(C)C)cc1
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?