CC1(C)C2CCC1(C)[C@H](n1c(=O)n([C@@H]3CC4CCC3(C)C4(C)C)c(=O)n([C@@H]3CC4CCC3(C)C4(C)C)c1=O)C2
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?