COc1ccc2c3c1OC1C(=O)CC[C@@]4(O)[C@@H](C2)N(C)CC[C@]314.Cl
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?