THE INTRAMOLECULAR DIELS-ALDER VINYLFURAN (IMDAV) REACTION: A SHORT APPROACH TO AZA-ANALOGUES OF PINGUISANE-TYPE SESQUITERPENES Статья Horak 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. Elsevier Ltd. Том 56. 2015. С. 4499-4501