Chemicals affect living organisms in both positive and negative ways, depending on the chemical. Chemicals can have different effects on different organisms, for example, potential drugs that work in animals studies but fail in human trials. A major reason to these differences is that species, individuals, and organs all have different kinds and amounts of enzymes. There is a need for a technology to rapidly, effectively, and economically test the heatlh effects of chemicals.

After discovering that a natural product has a particular, useful biological activity, it is desirable to prepare analogs of the natural product. However, natural products and their analogs are typically complex molecules requiring multi-step syntheses that are usually laborious, costly, and time consuming. This invention is directed to a microfluidics device that can be used to prepare natural products and their analogs.