IUPAC:methyl (1S,2S,3R,5R,6S,8S,10S)-2,6-dimethyl-8,21-dioxo-14-oxa-8lambda5-azahexacyclo[11.6.1.1^{1,5}.0^{2,10}.0^{3,8}.0^{17,20}]henicosa-13(20),17-diene-18-carboxylate
IUPAC:methyl (1S,2S,3R,5R,6S,8S,10S)-2,6-dimethyl-8,21-dioxo-14-oxa-8lambda5-azahexacyclo[11.6.1.1^{1,5}.0^{2,10}.0^{3,8}.0^{17,20}]henicosa-13(20),17-diene-18-carboxylate