COc1cccc(/C=C/C(=O)Nc2ccc3nc(N4CCN(C)CC4)cc(C)c3c2)c1OC
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?