CCCCCC(C)(C)CCC(=O)OC1OC(COC2OC(COC3OC(CO)C(O)C(O)C3O)C(O)C(O)C2O)C(O)C(O)C1O
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?