C[C@]12CC[C@H]3[C@H](CCC4=Cc5nc6nc7ccccc7n6cc5C[C@@]43C)[C@@H]1CC[C@@]2(O)C#N
A rotatable bond is defined as any single non-ring bond, attached to a non-terminal, non-hydrogen atom. Amide C-N bonds are not counted because of their high barrier to rotation.  How many rotatable bonds does the molecule have?