Diphenyl oxide 

Description and usage notes:

This material melts at 28 Centigrade. Arctander suggests these uses: “… It is not confined exclusively to Geranium and Rose types, since Fougeres, New Mown Hay and Hyacinth, to mention a few, can benefit from this chemical. Like many other low-cost perfume chemicals, it is often an interesting tool in the hands of a skilled perfumer with audacity and imagination and an urge to use materials in an ‘unconventional’ way.”