RING-CHAIN TAUTOMERISM IN THE PRODUCTS OF THE REACTION BETWEEN 5-SUBSTITUTED FURFURYLAMINES AND ANHYDRIDES OF Α,Β-UNSATURATED CARBOXYLIC ACIDS Article Zubkov F.I., Golubev V.D., Zaytsev V.P., Bakhanovich O.V., Nikitina E.V., Khrustalev V.N., Aysin R.R., Timofeeva T.V., Novikov R.A., Varlamov A.V. Chemistry of Heterocyclic Compounds. Латвийский институт органического синтеза Латвийской академии наук / Springer New York Consultants Bureau. Vol. 52. 2016. P. 225-236