Kim Phi Phung Nguyen

TL;DR: A good correlation is observed between calculated 13C nuclear shieldings of the enamine form and observed 13C chemical shifts.

TL;DR: Chemical investigation of the methanol extract of the fertile form of Roccella montagnei collected in Vietnam afforded twelve secondary metabolites, including five new montagnetol derivatives, orsellinylmontagnetols A-D and a furanyl derivative together with seven known compounds.

TL;DR: In this article, a biosynthetic route to sanctis A-C was proposed by using a methyl group instead of a pendant aromatic ring at C-9, a so far unprecedented structural feature in lichen Parmotrema sancti-angelii.

TL;DR: Chemical investigation on Parmotrema praesorediosum (Nyl.) Hale has led to the isolation of seven novel phenolic compounds, four diphenyl ethers and three phthalide derivatives, and the structure elucidation of these compounds are reported.

TL;DR: In this article, the authors investigated the chemical constituents of the lichen Usnea baileyi (Stirt) and found a new dimeric xanthone, bailexanthone (1), and a novel depsidone, bailesidone (2), along with twenty-five known metabolites.