@article {33290,
	title = {18, 19-Bisnor-13BH, 14-ah-cheilanthane: a novel degraded tricyclic sestertpenoid-type hydrocarbon from the Athabasca oil sands},
	volume = {23},
	year = {1982},
	pages = {2711-2714},
	publisher = {Tetrahedron Letters},
	author = {Ekweozor, Chukwuemeka M. and Strausz, Otto P.}
}
