N#Cc1cccc(NC(=O)c2ccc(C(=O)O)c(C(=O)c3ccc(C(=O)O)c(C(=O)Nc4cccc(C#N)c4)c3)c2)c1
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?