COc1ccc2c(c1)C(c1ccc(N3CCOCC3)cc1)=NNC(c1cccnc1)=N2
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?