CCOC(=O)C1CCN(C(=O)Cn2nc(C)n3c(cc4cc(C)ccc43)c2=O)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?