COc1ccc(C2c3[nH]c4ccccc4c3C[C@H]3C(=O)N(C4CCN(Cc5ccccc5)CC4)CC(=O)N23)c(OC)c1
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?