CYCLOADDITION OF FURFURYLAMINES TO MALEIC ANHYDRIDE AND ITS SUBSTITUTED DERIVATIVES ArticleZaytsev V.P., Mikhailova N.M., Airiyan I.K., Galkina E.V., Golubev V.D., Nikitina E.V., Zubkov F.I., Varlamov A.V.Chemistry of Heterocyclic Compounds. Том 48. 2012. С. 505-513