COc1ccc(NC(=O)CNC(=O)c2nn(-c3ccc(OC)cc3OC)c(=O)c3ccccc23)c(OC)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?