Compound 28

2,6-Dimethyl (rel-2S,3S)-2-methyl-8,18-diazatetracyclo[9.7.0.0³,⁸.0¹²,¹⁷]octadeca-1(11),4,6,12,14,16-hexaene-2,6-dicarboxylate

From: Biogenetically inspired synthesis and skeletal diversification of indole alkaloids