O=C1c2ccccc2C(=O)N1CC1c2ccccc2CCN1S(=O)(=O)c1c[nH]cn1
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?