Showing structure for 1-{[3-ethenyl-5-(methoxycarbonyl)-2-{[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}-3,4-dihydro-2h-pyran-4-yl]methyl}-6-hydroxy-1h,2h,3h,4h,9h-pyrido[3,4-b]indole-3-carboxylic acid