Three-component cyclization as an approach to a combinatorial library of2H-spiro-|chromeno|2,3-c|pyrrole-1,3'-indoline|-2',3,9-triones - R. N. Vydzhak; M. V. Kachaeva; S. G. Pilyo; V. S. Moskvina; O. V. Shablykina; A. V. Kozytskiy; V. S. Brovarets (Ukrainica Bioorganica Acta, 2020)