COc1cccc(-c2nc(CS(=O)(=O)CC(=O)NCCc3ccc(OC)cc3OC)c(C)o2)c1
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?