Synthetics
Birch tar oil rectified smells sharp, smoky, and leathery with hints of burnt wood, coal tar, and medicinal notes.
Luebke, William tgsc, (1982): Smoky burnt wood leathery phenolic
PerfumersWorld: Powerful burnt wood
Blends-well-with - +cananga +isoamyl phenyl acetate +heptyl eugenol +guaiyl butyrate