Some parts of smoke are characteristic on the combustion supply. Guaiacol and its derivatives are solutions of pyrolysis of lignin and therefore are attribute of wood smoke; other markers are syringol and derivates, and various methoxy phenols. Retene, a product of pyrolysis of conifer trees, is definitely an indicator https://broadfar.com/oraco-pioneering-a-smokeless-future-with-innovative-nicotine-delivery/