COc1ccc(OC)c(C2CC(=O)N(c3cccc(C)c3)C3=C2C(=O)OC3)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?