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Acta Cryst. (2008). E64, o1689 [ doi:10.1107/S1600536808023635 ]
4,4'-[8b,8c-Bis(ethoxycarbonyl)-4,8-dioxo-2,3,5,6-tetrahydro-1H,4H-2,3a,4a,6,7a,8a-hexaazacyclopenta[def]fluorene-2,6-diyl]dipyridinium bis(tetrafluoridoborate)
Online 6 August 2008
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