CC1(C)OC[C@@H]([C@H]2O[C@H](On3nnc4ccc(Cl)cc43)[C@@H]3OC(C)(C)O[C@H]23)O1
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?