None of them, other than the tobacco itself.....look at a pack of cigarettes for yourself!
(Quite apart from which there simply would not be ROOM on the average pack of cigarettes (even in really small print) to list all the additives they put in there to make the tobacco taste the same in each pack of the same brand, to make each cigarette burn evenly, and have an extended shelf-life so that it tastes "fresh" whether it was cured a week ago or twelve months ago....
Here's a list of the roughly 600 chemical additives typically used in tobacco;
There isn't any law that suggest that chemical or nuitritional information is required to be posted on cigarette packs. Only the tobacco, menthol and filter are depicted on any pack of cigarettes. Private organizations usually will list findings from their laboratories of reported chemicals in cigarettes. And, in some states this is recognizable. But other than the age requirement provision, no law exists that states there must be a chemical lab study placed on cigarette packs.