COc1ccccc1Nc1nn2c(=O)c3ccc(C(=O)N4CCCC(C)C4)cc3nc2s1
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?