CCOC(=O)C1CCCN(C(=O)c2ccc(C/N=c3\c(N4CCC(C)CC4)c(O)c3=O)cc2)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?