Kapadia, Nirav Facile synthesis of 4,5,6a,7-tetrahydrodibenzo[de,g]chromene heterocycles and their transformation to phenanthrene alkaloids. [electronic resource] - Tetrahedron Oct 2013 Publication Type: Journal Article ISSN: 0040-4020 Standard No.: 10.1016/j.tet.2013.07.095 doi