Cc1nn(C(C)C(=O)NCCCc2ccccc2)c(=O)c2nn(-c3ccccc3)c(C)c12
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?