Showing structure for methyl 2-ethyl-2,5,7,12-tetrahydroxy-4-{[5-({4-hydroxy-5-[(5-hydroxy-6-methyloxan-2-yl)oxy]-6-methyloxan-2-yl}oxy)-6-methyloxan-2-yl]oxy}-6,11-dioxo-3,4-dihydro-1h-tetracene-1-carboxylate