Crystal structure and Hirshfeld surface analysis of diethyl (3a<i>S</i>,3<i>a</i>1<i>R</i>,4<i>S</i>,5<i>S</i>,6<i>R</i>,6a<i>S</i>,7<i>R</i>,9a<i>S</i>)-3a1,5,6,6a-tetrahydro-1<i>H</i>,3<i>H</i>,4<i>H</i>,7<i>H</i>-3a,6:7,9a-diepoxybenzo[<i>de</i>]isochromene-4,5-dicarboxylate
Acta crystallographica. Section E, Crystallographic communications