Showing structure for [(1r,2s,10r,13s)-7,18-dimethoxy-6,17,21-trimethyl-5,8,12,16,19-pentaoxo-11,21-diazapentacyclo[11.7.1.0²,¹¹.0⁴,⁹.0¹⁵,²⁰]henicosa-4(9),6,15(20),17-tetraen-10-yl]methyl (2z)-2-methylbut-2-enoate