COc1ccc(/C=C2/C(=O)N(/C=C3\C(=O)Oc4ccccc4C3=O)/C(=N/C(C)=O)N2C)cc1OC
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?