In 1921, perfumer Ernest Beaux discovered that adding synthetic aldehydes to natural rose and jasmine scents produced just the right fragrance combination for the iconic CHANEL No. 5 perfume. Today, perfume makers have more than 3,000 synthetic scent molecules in their palettes. However, according to an article in Chemical & Engineering News (C&EN), the weekly newsmagazine of the American Chemical Society, consumer demand for natural ingredients has challenged perfumers to find natural, yet sustainable, scents.