O=C1CC(c2ccccc2)Cc2[nH]c(=O)c(-c3nc(-c4cccc(Cl)c4)cs3)cc21
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?