COc1cc(/C=C2\NC(=O)C(Cc3cc(OC)c(OC)c(C)c3OC)N(C(C)=O)C2=O)c(OC)c(C)c1OC
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?