COc1ccc(-c2nc3cnc(N4CCNCC4)nc3n(Cc3cccc(OC)c3)c2=O)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?