COc1nc2c(c(O)c(C)c(=O)n2OC2OC(COC(C)=O)C(OC(C)=O)C(OC(C)=O)C2OC(C)=O)c(=O)n1C
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?