IUPAC:4,5-dimethyl (1R,4S,12R,13R,21S)-20-oxo-5,15-diazahexacyclo[11.5.2.1^{1,12}.0^{4,12}.0^{6,11}.0^{15,21}]henicosa-6(11),7,9-triene-4,5-dicarboxylate
IUPAC:4,5-dimethyl (1R,4S,12R,13R,21S)-20-oxo-5,15-diazahexacyclo[11.5.2.1^{1,12}.0^{4,12}.0^{6,11}.0^{15,21}]henicosa-6(11),7,9-triene-4,5-dicarboxylate