CCOc1ccc(CC(=O)Nc2c(C(=O)c3ccccc3)oc3ccc(Cl)cc23)cc1OCC
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?