Text this: Hyperbranched poly(amino ester)s with different terminal amine groups for DNA delivery

  ______    _____                ___     _    _   
 /_   _//  |  ___||   ____      / _ \\  | |  | || 
   | ||    | ||__    |    \\   / //\ \\ | |/\| || 
  _| ||    | ||__    | [] ||  |  ___  |||  /\  || 
 /__//     |_____||  |  __//  |_||  |_|||_// \_|| 
 `--`      `-----`   |_|`-`   `-`   `-` `-`   `-` 
                     `-`