O=C(O)C(=O)O.O=c1c2ccccc2nc(-c2cccc(Cl)c2)n1NCC1(O)OCC(O)C(O)C1O
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?