O=C(Nc1ccc(NC(=O)N2CCN(c3ccccc3O)CC2)cc1)N1CCN(c2ccccc2O)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?