COc1ccc(C2CC(=O)Oc3c(C(CCN4CCN(c5ccccc5)CC4)c4ccc(N(C)C)cc4)c(OC)cc(OC)c32)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?