“…M. p. 158-160 ºC. 1 H NMR (300 MHz, CDCl 3 ) δ: 7.70-7.66 (m, 2H), 7.37-7.30 (m, 3H), 6.00 (d,J = 8.3 Hz,1H),4H),1H) 6-oxo-1-phenyl-3,4,6,7,8,8ahexahydropyrrolo[1,2-a] -6-oxo-3,4,6,7,8,8ahexahydropyrrolo[1,2-a] 3,4,4,6,7,8,pyrazine-8acarboxamide (6d). Orange solid (Hexane/AcOEt, 3:1).…”