Cc1ccc(NS(=O)(=O)c2ccc3[nH]c(-c4ccccc4)nc3c2)c(Cl)c1
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?