CCOc1ccc(N2C(=O)/C(=C\c3ccc(OC)c(O)c3)S(=O)(=O)C2c2cccc([N+](=O)[O-])c2)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?