COc1nc2c(c(=O)n1C)N[C@H]1[C@H](OC(C)=O)[C@@H](OC(C)=O)CO[C@H]1N2
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?