You could have a bank of carboxylic acids and various alcohols and perform https://en.wikipedia.org/wiki/Fischer%E2%80%93Speier_esterification https://en.wikipe

You could have a bank of carboxylic acids and various alcohols and perform https://en.wikipedia.org/wiki/Fischer%E2%80%93Speier_esterification https://en.wikipedia.org/wiki/Fischer%E2%80%93Speier_esterif... on the fly perhaps... You can make a good number of scents that way.