CC(=O)OC1CC[C@]2(C)C(CC(OC(C)=O)[C@@]3(C)C4=CC(=O)OC(c5ccoc5)[C@]4(C)CCC23)C1(C)C
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?