Showing structure for methyl 4-{3,4,5-trihydroxy-8,8-dimethyl-6,17-dioxo-19-oxa-7,16-diazahexacyclo[9.6.1.1¹,⁴.0²,⁹.0³,⁷.0¹⁵,¹⁸]nonadeca-11,13,15(18)-trien-16-yl}butanoate