CN1CN(c2ccccc2)C2(CCN(CC(C)(c3ccc(F)cc3)C3OCCCO3)CC2)C1=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?