COc1ccc(CN(C)C(=O)c2cccc(S(=O)(=O)N3CCCc4ccccc43)c2)c(OC)c1OC
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?