Results 241 to 250 of about 138,145 (310)

Stereochemistry. [PDF]

open access: yesJournal of the American Chemical Society, 1908
openaire   +1 more source

Direct Identification and Quantification of Flavonoids and Their Structural Isomers Using Ambient Ionization Tandem Mass Spectrometry

open access: yesRapid Communications in Mass Spectrometry, Volume 40, Issue 3, 15 February 2026.
ABSTRACT Rationale Flavonoids are phenolic compounds with many health‐benefiting properties. However, differentiating different types of flavonoids and their isomers is challenging due to their highly similar structures of various subtypes and different numbers and sites of substituents.
Yanqiu Wang   +4 more
wiley   +1 more source

Ribosomal Synthesis of Topologically Defined Thioisoindole‐Bridged Bicyclic Peptides

open access: yesAngewandte Chemie, Volume 138, Issue 2, 9 January 2026.
A flexible in vitro translation (FIT) system‐based strategy for ribosomal synthesis of thioisoindole‐bridged bicyclic (TiB) peptides is developed. The flexizyme substrate Ac‐Ala(NtBA)Sc‐CME is efficiently incorporated into FIT to generate ribosomal peptides bearing N‐terminal Ac‐Ala(NtBA)Sc as the cyclization handle, which after mild deprotection ...
Yue Zhang   +3 more
wiley   +2 more sources

Reporting Chemical Data in the Environmental Sciences. [PDF]

open access: yesACS Environ Au
Baskaran S   +6 more
europepmc   +1 more source

Mixed Stereochemistry Macrocycle Acts as a Helix-Stabilizing Peptide N-Cap [PDF]

open access: bronze
Fabian Hink   +5 more
openalex   +1 more source

On the Nature of Improper Hydrogen Bonding in RCH2F and RCHF2 Motifs

open access: yesAngewandte Chemie, Volume 138, Issue 2, 9 January 2026.
The nature of ‘improper’ hydrogen bonds is explored in FnC─H⋯X systems, such as RCF2H interaction with chloride and water. It is noted that increased fluorination decreases the positive charge density on H but increases it on C, thus these interactions are dominated by electrostatic attraction to C over H.
Bruno A. Piscelli   +3 more
wiley   +2 more sources

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