A new diphenyl ether from the cultured lichen mycobiont of cf. .

Lichen is well-known for its various purposes. However, understanding the chemical composition and antimicrobial characteristics of cf. remains insufficient.

Diphenyl ethers from the cultured lichen mycobiont of Zahlbr.

Purpose: Cultured lichen mycobionts are valuable sources of new natural compounds. Mycobiont of growing in Vietnam was isolated, cultivated and chemically investigated. The crude extract of this cultured mycobiont showed potent alpha-glucosidase inhibition with an IC value of 50 μg/mL.

Antimicrobial sesquiterpenes from the cultured mycobiont against methicillin-resistant isolated from Vietnamese street foods.

Traditionally, lichen has been used for many purposes, but there remains a lack of understanding regarding the chemical composition and antimicrobial characteristics of , a lichen native to Vietnam. In this study, four sesquiterpenes, diorygmones B-E (1-4), one phenolic compound, 3,5-dihydroxy-4-methoxybenzoic acid (5), and one sterol, β-sitosterol (6), were isolated and structurally elucidated from the cultured mycobiont of the lichen . Additionally, two compounds, stictic acid (7) and norstictic acid (8), were also isolated from the lichen Compounds 2-4 were new compounds.

Tinctoric acid A-B, two new hopan-type triterpenoids from the Vietnamese lichen, (Despr. ex Nyl.) hale with α-glucosidase inhibitory activity.

Two new hopan-type triterpenoids, namely tinctoric acid A-B (), were isolated from the lichen (Despr. ex Nyl.) Hale.

Two New α-Glucosidase Inhibitory Depsidones from the Lichen Parmotrema cristiferum (Taylor) Hale.

A bioactivity-guided investigation of the lichen Parmotrema cristiferum (Taylor) Hale (Parmeliaceae) led to the isolation of two new depsidones, cristifones A and B (1 and 2). The structures of the isolated compounds were identified by spectroscopic methods and comparison with the literature data. Compound 1 showed the initial combined structures of depsidone and depside cores.

Diorygmones A-B, two new guaiane-sesquiterpenes from the cultured lichen mycobiont of .

is a native crustose-lichen in Vietnam. A mycobiont of this lichen was isolated, then cultivated. The present study described the isolation and structural elucidation of two new guaiane-type sesquiterpenes, namely diorygmones A-B.

A new diphenyl ether from Hale growing in Vietnam.

Chemical investigation of the lichen Hale led to the isolation of one new diphenyl ether, parmetherine D (), along with eight known compounds (). The structures were determined by analysis of MS and NMR data and by comparison with the literature. Compounds , , and were evaluated for -glucosidase inhibition.

A new eremophilane-sesquiterpene from the cultured lichen mycobiont of sp.

Lichens, a natural source producing a number of valuable compounds is economically not feasible and profitable due to its slow growth. Mycobiont cultures are alternative sources which have become highly attractive for chemists recently. Mycobiont of sp.