CCOC(=O)C(C)NC(=O)c1c2c(nc3ccccc13)C(=O)N(C1CCCCC1)C2
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?