COc1ccc(N2C(=O)[C@H]3[C@@H](C2=O)[C@@H]2C=CC=NN2[C@H]3C(=O)c2ccc(OC(C)=O)cc2)cc1
A rotatable bond is defined as any single non-ring bond, attached to a non-terminal, non-hydrogen atom. How many bonds in the molecule are rotatable?