Showing structure for methyl (1r,9r,10r,12r)-15,20-dioxo-8,16-diazahexacyclo[8.8.2.2⁹,¹².0¹,⁹.0²,⁷.0¹²,¹⁶]docosa-2,4,6,13-tetraene-8-carboxylate