COc1ccccc1C1=Nn2c(nc3sc(C(=O)Nc4ccccc4Cl)c(C)c3c2=O)SC1
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?