Dextrose is glucose.
Maltodextrin, when there are no fats in the meal, is almost as fast as glucose and it may be preferred to have some so as to avoid extreme sweetness and to make the solution less concentrated (in terms of molecules per liter, as one maltodextrin molecule takes the place of many glucose molecules.)
A little fructose is fine as well. You don't want a lot of it though. I don't know the optimum amount, but certainly would consider more than say 25 g to be a lot (and being fairly close to that to be quite a bit and potentially more than optimal, but also maybe not, I dunno.)