CC(=O)Nc1ccc(Nc2ncnc3c2c(-c2ccccc2)cn3-c2ccc(C)c(Cl)c2)cc1
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?