COc1c(C(=O)/C(=N/Nc2ccccc2)C(C)=O)c(O)c(OC)c2occc12
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?