O=C(Cn1c(=O)n(-c2ccccc2Cl)c(=O)c2sc3ccccc3c21)N1CCCC1
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?