4,7-dihydro-6-methoxy-2-methyl-4,7-dioxobenzofuran-3-carboxylic acid

4,7-dihydro-3-hydroxymethyl-6-methoxy-2-methylbenzofuran-4,7-dione

3-(2,5-dioxopyrrolidin-1-yloxy)methyl-6-methoxy-1-methyl-1H-indole-4,7-dione

1-(3-hydroxypropyl)-6-methoxy-3-(2,4,6-trifluorophenoxy)methyl-1H-indole-4,7-dione