COc1cc([C@H]2c3[nH]c4ccccc4c3C[C@H]3C(=O)N4[C@@H](Cc5c([nH]c6ccccc56)[C@@H]4c4cc(OC)c(OC)c(OC)c4)C(=O)N32)cc(OC)c1OC
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?