The chemicals featured on the shirt are Vanillin (vanilla scent), Furfural (an almond-like scent), Ethyl Benzene (a sweet scent), Toluene (a sweet scent), and Benzaldehyde (an almond-like scent). Main source: "Identification of Volatile Organic Compounds Emitted by a Naturally Aged book" by A. Lattuati-Derieux et al. (2004)."