Cc1ccc(-c2nnc(Nc3ccc(OCC(N)=O)cc3)c3ccccc23)cc1S(N)(=O)=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?