Yes- three, Sorbitol, Saccharine, Acesulfame K, in that order.
As a personal note I would add that I strongly dislike the taste of most sweeteners, and I find these tablets ok, probably because, Sorbitol and Acesulfame K are two of the least offensive tasting sweeteners and these tablets also include citric acid and malic acid which offset the sweetness nicely and make it quite 'fresh' tasting