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In the title compound, C 27 H 28 N 2 O 7 S, the dihedral angles between the thia­zole ring and the mono- and tris­ubstituted benzene rings are 87.8 (2) and 17.9 (3)°, respectively. The dihydro­pyrimidine ring adopts a flattened boat conformation. In the crystal structure, π–π stacking occurs [centroid–centroid separation = 3.6611 (11) Å].

acta crystallographica. section e

(2Z)-Ethyl 5-(4-methoxyphenyl)-7-methyl-3-oxo-2-(3,4,5-trimethoxybenzylidene)-3,5-dihydro-2H-thiazolo[3,2-a]pyrimidine-6-carboxylate