Showing structure for 5-acetyl-3,4,5,17-tetrahydroxy-8,8-dimethyl-19-oxa-7,16-diazahexacyclo[9.6.1.1¹,⁴.0²,⁹.0³,⁷.0¹⁵,¹⁸]nonadeca-11,13,15(18),16-tetraen-6-one