COc1ccc(OC)c(C2=CC(=O)C[C@H](c3ccc4c(c3)OCO4)C2)c1
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?