O=C(NCCC1=CCCCC1)c1ccc2c(c1)N(Cc1ccc(Cl)cc1)C(=O)c1ccccc1S2(=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?