Showing structure for (3r)-7-amino-8-[(3r)-7,10-dihydroxy-3-methyl-1,6,9-trioxo-3h,4h-naphtho[2,3-c]pyran-8-yl]-10-hydroxy-3-methyl-3h,4h-naphtho[2,3-c]pyran-1,6,9-trione