1-((2R,3S,4R)-3.4-dihydro-2-dimethoxymethyl-3-hydroxy-2-methyl-6-nitro-2H-1-benzopyran-4-yl)-(2R)-5-methoxy-2,3-dihydro-1H-indole-2-carboxylic acid ethyl ester
1-((2r,3s,4r)-3.4-dihydro-2-dimethoxymethyl-3-hydroxy-2-methyl-6-nitro-2h-1-benzopyran-4-yl)-(2r)-5-methoxy-2,3-dihydro-1h-indole-2-carboxylic acid ethyl ester