4,5,6,4',5',6'-hexahydroxy-diphenic acid dimethyl ester

鞣花酸

Purpurogallin-4-carbonsaeure-methylester

5-(2,3,4-Trihydroxy-6-methoxycarbonylphenyl)-4-methoxycarbonyl-2-furancarbonsaeure

3-Carboxy-2,3-dihydro-6,7-dihydroxy-2,4-bis(methoxycarbonyl)-1-benzofuran-2-essigsaeure