Crystal structures of two 4<i>H</i>-chromene derivatives: 2-amino-3-cyano-4-(3,4-dichlorophenyl)-7-hydroxy-4<i>H</i>-benzo[1,2-<i>b</i>]pyran 1,4-dioxane monosolvate and 2-amino-3-cyano-4-(2,6-dichlorophenyl)-7-hydroxy-4<i>H</i>-benzo[1,2-<i>b</i>]pyran
Acta crystallographica. Section E, Crystallographic communications