COc1ccc(-n2cc(CNCC3CC(=O)N(C4CC4)C3)c(-c3ccccc3Cl)n2)cc1
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?