- "The removal of caffeine from beverages has plagued bartenders and restauranteurs for centuries! You can't expect me to solve it overnight!"
Caffeine (C8H10N4O2) is a stimulant present in a variety of foods and beverages, including coffee and raktajino. It can be somewhat addictive to most humanoids (excluding Vulcans) if consumed on a regular basis. For centuries bartenders and manufacturers have tried unsuccessfully to create a suitable substitute.
As of the 24th century, there was yet to be a decaffeinated raktajino with a decent taste. Quark's attempt to create such a beverage for Major Kira during her pregnancy with Miles and Keiko O'Brien's son failed miserably. Had he succeeded, the new concoction would have been called "Quarktajino". (DS9: "Nor the Battle to the Strong")