TY JOUR TI Diastereomeric composition of the reaction of the formation of hexahydro-5H-chromeno[4,3-d]pyrimidin-5-ones KW 2-thio-1,2,3,4,4a,10b-hexahydro-5H-chromeno[4,3-d]pyrimidine-ones KW acid-catalyzed condensation KW monitoring JO From Chemistry Towards Technology Step-By-Step AU Filimonov, S.I. AU Makarova, E.S. AU Chirkova, Z.V. AU Kabanova, M.V. PY 2022 IS 3 PB Yaroslavl State Technical University