C#C[C@]1(O)CC[C@H]2[C@@H]3CCC4=Cc5nc6nc7ccccc7n6cc5C[C@]4(C)[C@H]3CC[C@@]21C
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?