COc1ccc(-c2csc(/C(C#N)=C/Nc3cc4oc5ccccc5c4cc3OC)n2)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?