sentence: Chemists start to design a chemical synthesis by selecting compounds to combine.
sentences_after: These starting compounds are known as reagents or reactants. Chemists use various reaction types to these to synthesize the product, or an intermediate product. This requires mixing the compounds in a reaction vessel. Many reactions require some form of work-up procedure before the final product is isolated. Vogel's Textbook of Practical Organic Chemistry, 5th Edition'.
concept_name: chemist
headings: Chemical synthesis
categories: Chemistry