Glutaconicacid, 4-(4H-pyrido[1,2-a]pyrimidin-3-ylmethylene)- (8CI);4H-Pyrido[1,2-a]pyrimidine, 2-pentenedioic acid deriv.;4H-Pyrido[1,2-a]pyrimidine, 3-(2,4-dicarboxy-1,3-butadienyl)-
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