decane-3,5,6,8-tetraone

8-methoxyisocoumarin-3-carboxylic acid ethyl ester

N-(4-Amino-benzolsulfonyl)-oxamidsaeure-ethylester

ethyl 4-(2-ethoxyphenyl)-2-hydroxy-4-oxo-2-butenoate

1,6-bis-p-chlorophenyl-3,4-dihydroxy-2,4-hexadiene-1,6-dione