COc1cc([C@H]2c3cc4c(cc3[C@@H](O[C@@H]3O[C@H]5CO[C@@H](C)O[C@]5(O)C[C@H]3O)[C@@H]3COC(=O)[C@H]23)OCO4)cc(OC)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?