COC(=O)c1cc(C(=O)OC)c(CC(=O)C(=O)NC2C3CC4CC(C3)CC2C4)nc1CC(=O)C(=O)NC1C2CC3CC(C2)CC1C3
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?