| 4-(hydroperoxyacetyl)-3-methyl-2-benzofurancarboxylic aci ethyl ester |
| 5-(carboxymethoxy)-3-methyl-2-benzofurancarboxylic aci 2-ethyl ester |
| 4-(2-carbethoxy-3-methylbenzofuryl)-oxyacetic acid |
| 4-(hydroperoxyacetyl)-3-methyl-2-benzofurancarboxylic acid ethyl ester |
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