CCN(CC)CCN1C(=O)c2c(c3c4cccc(Cl)c4n(C4OC(CO)C(OC)C(O)C4O)c3c3[nH]c4c(Cl)cccc4c23)C1=O
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?