1: 4-(2-chloro-phenyl)-2-(2-hydroxyimino-ethoxymethyl)-6-methyl-1,4-dihydro-pyridine-3,5-dicarboxylic acid 3-ethyl ester 5-methyl ester With hydrogen; palladium 10 on activated carbon in acetic acid T=20°C; P=760.051 Torr; 4 h; 2: cis-maleic acid in ethanol

in methanol; toluene T=21 - 24°C; 1 h;

in ethanol; palladium

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