THE INTRAMOLECULAR DIELS-ALDER VINYLFURAN (IMDAV) REACTION: A SHORT APPROACH TO AZA-ANALOGUES OF PINGUISANE-TYPE SESQUITERPENES ArticleHorak Y.I., Lytvyn R.Z., Homza Y.V., Zaytsev V.P., Mertsalov D.F., Babkina M.N., Nikitina E.V., Lis T., Kinzhybalo V., Matiychuk V.S., Zubkov F.I., Varlamov A.V., Obushak M.D.Tetrahedron Letters. Том 56. 2015. С. 4499-4501