What is the flavor of seven?

Yours truly was responding to the super buy on soda pop down at the local Safeway. He scanned the ingredients of several and found that for Seven-up. they had listed "natural flavors" Thus the question arose, what is the flavor of Seven? One certainly has some rational expectation of how orange soda should taste, as well as lemon, lime and others. Actually, the flavor of 7-up, by experiment, has a bit of suggestion of lemon and lime, but is this what one is supposed to taste? In the words of the king of Siam, "Is a puzzlement."