COc1cc(C(=O)N/N=C/c2ccc(OC(=O)c3ccccc3Cl)c(OC)c2)ccc1O
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?