CN[C@H]1CC[C@]23C[C@]24CC[C@]2(C)[C@@H]([C@H](C)N(C)C)CC[C@@]2(C)[C@@H]4CC[C@H]3C1(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?