How are best and most expensive perfumes in the world made up of?

alcohols- and ester-containing compoundsHow are best and most expensive perfumes in the world made up of?
In general, the best and most expensive perfumes are made of natural ingredients (example Roses scent), but the know-how of each perfume is an industrial recipe that every company keeps secret. Hence, to know the real composition and way of making it is near impossible.How are best and most expensive perfumes in the world made up of?
Toilet water

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