COc1ccc(C2=NNC(=O)c3ccccc3N2c2nc(-c3cccs3)nc3cc(OC)c(OC)cc23)cc1
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?