Some elements of smoke are characteristic on the combustion source. Guaiacol and its derivatives are items of pyrolysis of lignin and they are attribute of Wooden smoke; other markers are syringol and derivates, and various methoxy phenols. Retene, a product of pyrolysis of conifer trees, can be an indicator https://broadfar.com/oraco-global-trends-in-heat-not-burn-products/