Showing structure for 3,4,5-trihydroxy-8,8,16-trimethyl-19-oxa-7,16-diazahexacyclo[9.6.1.1¹,⁴.0²,⁹.0³,⁷.0¹⁵,¹⁸]nonadeca-11,13,15(18)-triene-6,17-dione