COc1cc(OC)c2c(c1C(CCN1CCN(c3ccccc3)CC1)c1ccc(N(C)C)cc1)OC(=O)CC2c1ccc(N(C)C)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?