CCCc1nnc2sc(COc3cc(Cl)c(OCc4nn5c(CCC)nnc5s4)cc3Cl)nn12
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?