Here is a list of chemicals added to cigarettes that were not present until the last 80 years. Unfortunately, there are so many that I can not post them all in one response.

• Acetanisole • Acetic Acid • Acetoin • Acetophenone • 6-Acetoxydihydrotheaspirane • 2-Acetyl-3- Ethylpyrazine • 2-Acetyl-5-Methylfuran • Acetylpyrazine • 2-Acetylpyridine • 3-Acetylpyridine • 2-Acetylthiazole • Aconitic Acid • dl-Alanine • Alfalfa Extract • Allspice Extract,Oleoresin, and Oil • Allyl Hexanoate • Allyl Ionone • Almond Bitter Oil • Ambergris Tincture • Ammonia • Ammonium Bicarbonate • Ammonium Hydroxide • Ammonium Phosphate Dibasic • Ammonium Sulfide • Amyl Alcohol • Amyl Butyrate • Amyl Formate • Amyl Octanoate • alpha-Amylcinnamaldehyde • Amyris Oil • trans-Anethole • Angelica Root Extract, Oil and Seed Oil • Anise • Anise Star, Extract and Oils • Anisyl Acetate • Anisyl Alcohol • Anisyl Formate • Anisyl Phenylacetate • Apple Juice Concentrate, Extract, and Skins • Apricot Extract and Juice Concentrate • 1-Arginine • Asafetida Fluid Extract And Oil • Ascorbic Acid • 1-Asparagine Monohydrate • 1-Aspartic Acid • Balsam Peru and Oil • Basil Oil • Bay Leaf, Oil and Sweet Oil • Beeswax White • Beet Juice Concentrate • Benzaldehyde • Benzaldehyde Glyceryl Acetal • Benzoic Acid, Benzoin • Benzoin Resin • Benzophenone • Benzyl Alcohol • Benzyl Benzoate • Benzyl Butyrate • Benzyl Cinnamate • Benzyl Propionate • Benzyl Salicylate • Bergamot Oil • Bisabolene • Black Currant Buds Absolute • Borneol • Bornyl Acetate • Buchu Leaf Oil • 1,3-Butanediol • 2,3-Butanedione • 1-Butanol • 2-Butanone • 4(2-Butenylidene)-3,5,5-Trimethyl-2-Cyclohexen-1-One • Butter, Butter Esters, and Butter Oil • Butyl Acetate • Butyl Butyrate • Butyl Butyryl Lactate • Butyl Isovalerate • Butyl Phenylacetate • Butyl Undecylenate • 3-Butylidenephthalide • Butyric Acid] • Cadinene • Caffeine • Calcium Carbonate • Camphene • Cananga Oil • Capsicum Oleoresin • Caramel Color • Caraway Oil • Carbon Dioxide • Cardamom Oleoresin, Extract, Seed Oil, and Powder • Carob Bean and Extract • beta-Carotene • Carrot Oil • Carvacrol • 4-Carvomenthenol • 1-Carvone • beta-Caryophyllene • beta-Caryophyllene Oxide • Cascarilla Oil and Bark Extract • Cassia Bark Oil • Cassie Absolute and Oil • Castoreum Extract, Tincture and Absolute • Cedar Leaf Oil • Cedarwood Oil Terpenes and Virginiana • Cedrol • Celery Seed Extract, Solid, Oil, And Oleoresin • Cellulose Fiber • Chamomile Flower Oil And Extract • Chicory Extract • Chocolate • Cinnamaldehyde • Cinnamic Acid • Cinnamon Leaf Oil, Bark Oil, and Extract • Cinnamyl Acetate • Cinnamyl Alcohol • Cinnamyl Cinnamate • Cinnamyl Isovalerate • Cinnamyl Propionate • Citral • Citric Acid • Citronella Oil • dl-Citronellol • Citronellyl Butyrate • itronellyl Isobutyrate • Civet Absolute • Clary Oil • Clover Tops, Red Solid Extract • Cocoa • Cocoa Shells, Extract, Distillate And Powder • Coconut Oil • Coffee • Cognac White and Green Oil • Copaiba Oil • Coriander Extract and Oil • Corn Oil • Corn Silk • Costus Root Oil • Cubeb Oil • Cuminaldehyde • para-Cymene • 1-Cysteine Dandelion Root Solid Extract • Davana Oil • 2-trans, 4-trans-Decadienal • delta-Decalactone • gamma-Decalactone • Decanal • Decanoic Acid • 1-Decanol • 2-Decenal • Dehydromenthofurolactone • Diethyl Malonate • Diethyl Sebacate • 2,3-Diethylpyrazine • Dihydro Anethole • 5,7-Dihydro-2-Methylthieno(3,4-D) Pyrimidine • Dill Seed Oil and Extract • meta-Dimethoxybenzene • para-Dimethoxybenzene • 2,6-Dimethoxyphenol • Dimethyl Succinate • 3,4-Dimethyl-1,2 Cyclopentanedione • 3,5- Dimethyl-1,2-Cyclopentanedione • 3,7-Dimethyl-1,3,6-Octatriene • 4,5-Dimethyl-3-Hydroxy-2,5- Dihydrofuran-2-One • 6,10-Dimethyl-5,9-Undecadien- 2-One • 3,7-Dimethyl-6-Octenoic Acid • 2,4 Dimethylacetophenone • alpha,para-Dimethylbenzyl Alcohol • alpha,alpha-Dimethylphenethyl Acetate • alpha,alpha Dimethylphenethyl Butyrate • 2,3-Dimethylpyrazine • 2,5-Dimethylpyrazine • 2,6-Dimethylpyrazine • Dimethyltetrahydrobenzofuranone • delta-Dodecalactone • gamma-Dodecalactone • para-Ethoxybenzaldehyde • Ethyl 10-Undecenoate • Ethyl 2-Methylbutyrate • Ethyl Acetate • Ethyl Acetoacetate • Ethyl Alcohol • Ethyl Benzoate • Ethyl Butyrate • Ethyl Cinnamate • Ethyl Decanoate • Ethyl Fenchol • Ethyl Furoate • Ethyl Heptanoate • Ethyl Hexanoate • Ethyl Isovalerate • Ethyl Lactate • Ethyl Laurate • Ethyl Levulinate • Ethyl Maltol • Ethyl Methyl Phenylglycidate • Ethyl Myristate • Ethyl Nonanoate • Ethyl Octadecanoate • Ethyl Octanoate • Ethyl Oleate • Ethyl Palmitate • Ethyl Phenylacetate • Ethyl Propionate • Ethyl Salicylate • Ethyl trans-2-Butenoate • Ethyl Valerate • Ethyl Vanillin • 2-Ethyl (or Methyl)-(3,5 and 6)-Methoxypyrazine • 2-Ethyl-1-Hexanol, 3-Ethyl -2 - Hydroxy-2-Cyclopenten-1-One • 2-Ethyl-3, (5 or 6)-Dimethylpyrazine • 5-Ethyl-3-Hydroxy-4-Methyl-2 (5H)-Furanone • 2-Ethyl-3-Methylpyrazine • 4-Ethylbenzaldehyde • 4-Ethylguaiacol • para-Ethylphenol • 3-Ethylpyridine • Eucalyptol • Farnesol • D-Fenchone • Fennel Sweet Oil • Fenugreek, Extract, Resin, and Absolute • Fig Juice Concentrate • Food Starch Modified • Furfuryl Mercaptan • 4-(2-Furyl)-3-Buten-2-One • Galbanum Oil • Genet Absolute • Gentian Root Extract • Geraniol • Geranium Rose Oil