CCOc1cc(/C=C2\CCC/C(=C\c3cc(Cl)c(O)c(OCC)c3)C2=O)cc(Cl)c1O
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?