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ACD/Labs Blog

Mikhail Elyashberg
Sung et al. isolated two new caryophyllene-type sesquiterpenoids, rumphellol A and B, from the Rumphella antipathies gorgorian coral. These compounds contain a 9-membered ring fused with a cyclobutane ring, which is rarely observed in natural products. We used ACD/Structure Elucidator to confirm the structure of rumphellol A (molecular formula C15H24O2).

Jesse Harris
Is there anything that analytical chemists hate more than false positives and false negatives? While it is impossible to eliminate error completely, it is possible to control it. Understanding the relationship between false positives and negatives allows us to optimize our experimental design. We discuss more in this blog post.

Sanji Bhal
ACD/Labs is committed to supporting scientific experts from many of the world’s leading biopharmaceutical and chemical companies in identifying, verifying, and elucidating chemical structures. Recently, we brought together some of these experts to discuss their workflows and how they’ve improved efficiency and confidence in structure determination.

Baljit Bains
Mass spectrometry (MS) is a valuable tool that can give you vast amounts of MS data to help you identify and quantify components. MS has been used to discover, determine, and quantify sample compounds in the proteomics, metabolomics, imaging, and glycomics applications across the food, pharmaceutical, and environmental industries. Combining MS with appropriate software and computer technology allows the possibility for more extensive applications. But first, we must understand the basics.

Mikhail Elyashberg
Using the traditional method of structure elucidation based on analysis of HSQC, HMBC and COSY data, the authors deduced a large part of the molecular structure, but the lack of carbons bearing hydrogen atoms prevented them to assemble the full structure. To alleviate this problem, ACD/Structure Elucidator was utilized in Trichopsistide A, molecular formula C23H29NO5.

Arvin Moser
Due to their broad peaks and wide range of chemical shifts in 1H NMR spectra, exchangeable protons are known to pose challenges in NMR interpretation, but collecting 2D spectra and selecting proper experimental conditions can sometimes be used in our favor to learn more.

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