Acta Crystallographica Section E
Acta Crystallographica
Section E CRYSTALLOGRAPHIC COMMUNICATIONS

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Diethyl 5,10-dihydro-9-methoxy-6-nitro-4,11-dioxo-cis-1H,3H,4H,11H-2-oxa-3a,4a,10a,11a-tetraazabenz[f]indeno[2,1,7-ija]azulene-11b,11c-dicarboxylate

The crystal structure of the title compound, C₂₁H₂₃N₅O₁₀, an important intermediate for molecular tweezers, shows intermolecular hydrogen bonding.

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Diethyl 5,10-dihydro-9-meth­oxy-6-nitro-4,11-dioxo-cis-1H,3H,4H,11H-2-oxa-3a,4a,10a,11a-tetra­azabenz[f]indeno[2,1,7-ija]azulene-11b,11c-dicarboxyl­ate