CCCCN1C(=O)NC(=O)C2(Cc3c(nc4c(C)cccn4c3=O)N3CCc4ccccc4C32)C1=O
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?