O=C(CSc1nc2c3ccccc3nc-2c(O)n1-c1cccc(Cl)c1)N1CCOCC1
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?