Molecular formula :
nature : the first refers to coal tar or petroleum products for the synthesis of spices, dyes, resins, drugs, plasticizers, rubber etc chemical products for the process to produce an intermediate product. Organic synthesis is generally refers to the process of the intermediate product. For example, benzene generated by nitrification nitrobenzene, and then restore production of aniline, p-both by a series of reactions processed into dyes, resins, drugs, in this series of synthetic process, nitrobenzene and aniline is intermediates.
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