N#Cc1cccc(N2C(=O)C3C4C=CC(C3C2=O)C2C(=O)N(c3cccc(C#N)c3)C(=O)C42)c1
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?