O=C1[C@H]2O[C@@H]2[C@@H](O)[C@H]2[C@H]1CCn1c(=O)n(Cc3cc4c(cc3Cl)OCO4)c(=O)n12
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?