CCc1ccc(Cc2ccc(CC)c(NC(=O)C(=O)Cc3nc4ccccc4nc3C)c2CC)c(CC)c1NC(=O)C(=O)Cc1nc2ccccc2nc1C
A rotatable bond is defined as any single non-ring bond, attached to a non-terminal, non-hydrogen atom. How many bonds in the molecule are rotatable?