δ (ppm) Multiplicity Coupling constant J in (hertz) Integrals 7.26 Doublet of doublet 5.03,3.3 2H 7.0234 Doublet of doublet 1.10,0.92 2H 6.97 Doublet of doublet 5.13,2.93 2H 5.7094 Doublet of doublet - 2H

Table 4: Interpretation of NMR results of the 1,4-dihydronaphthalene-1,4-endoxide.