The crystal structures of 6′-(4-chlorophenyl)- and 6′-(4-methoxyphenyl)-6a′-nitro-6a′,6b′,7′,9′,10′,12a′-hexahydro-2<i>H</i>,6′<i>H</i>,8′<i>H</i>-spiro[acenaphthylene-1,12′-chromeno[3,4-<i>a</i>]indolizin]-2-one
Acta crystallographica. Section E, Crystallographic communications