C=CCOC(=O)C1=C[C@H](c2cn(C(C)=O)c3ccccc23)[C@@H](CCCO)[C@H](OCC)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?