1-Methyl-3,8-dihydroxy-9,10-dihydro-9,10-dioxoanthracene-2-carboxylic acid methyl ester;9,10-Dihydro-3,8-dihydroxy-1-methyl-9,10-dioxo-2-anthracenecarboxylic acid methyl ester;Aloesaponarin I
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