CC1(OC(=O)c2cnc3ccccc3n2)C(=O)C=C2C=C(C3CC3)OC=C2C1=O
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?