[Bjonnh.net]# _

Authors: Mary P. Choules ORCID , Jonathan Bisson ORCID , Wei Gao , David C. Lankin ORCID , James B. McAlpine ORCID , Matthias Niemitz ORCID , Birgit U. Jaki ORCID , Scott G. Franzblau ORCID , Guido F. Pauli ORCID
Journal: Journal of Organic Chemistry (RoMEO status: White)
Subjects:
NMR
Ensuring identity, purity, and reproducibility are equally essential during synthetic chemistry, drug discovery, and for pharmaceutical product safety. Many peptidic APIs are large molecules that require considerable effort for integrity assurance. This study builds on quantum mechanical 1H iterative Full Spin Analysis (HiFSA) to establish NMR peptide sequencing methodology that overcomes the intrinsic limitations of principal compendial methods in identifying small structural changes or minor impurities that affect effectiveness and safety.
Read More...
categories publications science
Authors: Guido F. Pauli ORCID , Shao-Nong Chen ORCID , David C. Lankin ORCID , Jonathan Bisson ORCID , Ryan J. Case , Lucas R. Chadwick , Tanja Gödecke , Taichi Inui , Aleksej Krunic , Birgit U. Jaki ORCID , James B. McAlpine ORCID , Shunyan Mo , José G. Napolitano , Jimmy Orjala , Juuso Lehtivarjo , Samuli-Petrus Korhonen , Matthias Niemitz ORCID
Journal: Journal of Natural Products (RoMEO status: White)
Subjects:
NMR
The present study demonstrates the importance of adequate precision when reporting the δ and J parameters of frequency domain 1H NMR (HNMR) data. Using a variety of structural classes (terpenoids, phenolics, alkaloids) from different taxa (plants, cyanobacteria), this study develops rationales that explain the importance of enhanced precision in NMR spectroscopic analysis and rationalizes the need for reporting Δδ and ΔJ values at the 0.1–1 ppb and 10 mHz level, respectively.
Read More...
categories publications science