COC(=O)C12OCC34C(CC5C(C)=CC(=O)C(O)C5(C)C3C(O)C1O)OC(=O)C(OC(=O)CC(C)C)C24
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?