CCN(CC)CCCN1C(=O)C(O)=C(C(=O)c2cc3cccc(OC)c3o2)C1c1ccncc1
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?