CCN(CC)CCOC(=O)c1ccc(N/C=C(/C#N)c2nc(-c3cccc(OC)c3)cs2)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?