C NMR-based dereplication using MixONat software to decipher potent anti-cholinesterase compounds in Mesua lepidota bark.

A bio-assay guided fractionation strategy based on cholinesterase assay combined with C NMR-based dereplication was used to identify active metabolites from the bark of Mesua lepidota. Eight compounds were identified with the aid of the C NMR-based dereplication software, MixONat, i.e.

Targeting MHC Regulation Using Polycyclic Polyprenylated Acylphloroglucinols Isolated from .

Modulation of major histocompatibility complex (MHC) expression using drugs has been proposed to control immunity. Phytochemical investigations on species have allowed the isolation of bioactive compounds such as polycyclic polyprenylated acylphloroglucinols (PPAPs). PPAPs such as guttiferone J (), display anti-inflammatory and immunoregulatory activities while garcinol () is a histone acetyltransferases (HAT) p300 inhibitor.

C-NMR dereplication of Garcinia extracts: Predicted chemical shifts as reliable databases.

Usually isolated from Garcinia (Clusiaceae) or Hypericum (Hypericaceae) species, some Polycyclic Polyprenylated AcylPhloroglucinols (PPAPs) have been recently reported as potential research tools for immunotherapy. Aiming at exploring the chemodiversity of PPAPs amongst Garcinia genus, a dereplication process suitable for such natural compounds has been developed. Although less sensitive than mass spectrometry, NMR spectroscopy is perfectly reproducible and allows stereoisomers distinction, justifying the development of C-NMR strategies.