(2,5-diacetoxy-phenyl)-acetic acid methyl ester

(4-acetyloxy-3-carbonochloridoylphenyl) acetate

2,5-diacetyloxybenzoic acid

1-(2,5-diacetoxy-phenyl)-2-diazo-ethanone

(2,5-dihydroxy-phenyl)-glyoxylic acid