4-(2-Benzyloxy-3,4-dimethoxy-phenyl)-6-(6-methoxy-5-nitro-quinolin-2-yl)-3-methyl-pyridine-2,5-dicarboxylic acid

4-(2-Benzyloxy-3,4-dimethoxy-phenyl)-6-(6-methoxy-5-nitro-quinolin-2-yl)-3-methyl-pyridine-2,5-dicarboxylic acid 2-methyl ester