CCc1c(O)c(O)c(C(C)=O)c2c(O)c(-c3c(C)cc4c(CC)c(O)c(O)c(C(C)=O)c4c3O)c(C)cc12
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?