Natural Products distinguishing

The structural feature that distinguishes terpenes from other natural products is the iso prene unit The carbon skeleton of myrcene (exclusive of its double bonds) corresponds to the head to tail union of two isoprene units... 

DKPs, and 2,6-DKPs can be distinguished on the basis of intramolecular C-N cyclization, tandem reactions, and synthetic methods used. 2,3-DKPs have been used in medicinal chemistry and are found in natural products such as antibiotics (piperacillin), cefoperazone, and bicyclomycin. 2,5-DKPs are common namrally occurring peptide derivatives and are frequently generated as unwanted by-products in the synthesis of oligopeptides. " ... 

Natural products, from plants and foods to rocks and minerals, are complicated systems, but their analysis by Raman spectroscopy is a growing area. Most examples come from quality control laboratories, motivated to replace current time-consuming sample preparation and analysis steps with a less labor-intensive, faster technique but most authors anticipated the eventual application to process control. Often a method will be practiced in a trading house or customs facility to distinguish between items perceived to be of different qualities, and thus prices. 

Stahura F, Godden JW, Xue L, Bajorath J. (2000) Distinguishing between natural products and synthetic molecules by descriptor Shannon entropy analysis and binary QSAR calculations. J Chem Inf Comput Sci 40 1245-1252. 

Lipid/bitumen compounds used as indicators for environmental and geological processes (distinguish contemporary natural products from fossil derivatives). 

Synthetic organic compounds (distinguish from natural products and fossil derivatives). ... 

Other organic compounds (distinguish abiotic and thermal resynthesis from natural products). ... 

D-Ascorbic acid (lAA) is not present in natural products, but it is present in vitamin C-enriched foods or as an antioxidant. Therefore, it is important to distinguish between AA and lAA [417]. 

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