Aldehydes are vital; Aldehyde C10, C11, C12 lauric. A couple of synthetic musks, such as Galaxolide, Tonalide, Helvetolide; all smell like clean laundry. Lavender, has always been traditionally associated with soap. Something ozonic like Calone, or Floralozone. Something to make a nice dry, woody back, and possible some extra floral notes; not really sure what you are after. I'm sure others will add to this.