Cc1cc(-c2ccc(C(C)C)c(S(=O)(=O)N3CCN(c4ccccn4)CC3)c2)on1
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?