I don't think it possible for a single aroma chemical to mimic the complexity of even the most simple Essential Oil. An Essential Oil contains many (hundreds of) individual chemicals, each of which evapourates at a different rate, each one smelling different, each one combining with the others to create a complex and ever changing odour profile. I also don't think that "Modern chemical perfumers are seeking for the one molecule that will give natural feeling".
Could you expalin what is a "synthetic perfume"?
And as for the "vital force of natural ingredients"; I thought that the concept of Vitalism died out in the 19th Century!