Chromolaena laevigata (Asteraceae) as a source of endophytic non-aflatoxigenic Aspergillus flavus: chemical profile in different culture conditions and biological applications.

Endophytes are microorganisms that form symbiotic relationships with their host. These microorganisms can produce a variety of secondary metabolites, some of which have inhibitory effects on pests and pathogens or even act to promote plant growth. Due to these characteristics, these microorganisms are used as sources of biologically active substances for a wide range of biotechnological applications.

New cadinene-sesquiterpene from (lam.) R. M. King & H. Rob (Asteraceae) aerial parts and biological activities.

Phytochemical investigation of led to the isolation of a new cadinene-sesquiterpene, chromolaevigone glucoside (), along with nine known compounds: daucosterol (), stigmasterol glycoside (), stigmasterol (), β-sitosterol (), pilloin (), gonzalitosin I (), quercetin-3--α-rhamnopyranoside (), 7,7-dihydroxy-calamen-12-oic acid lactone () and trachelanthic acid (). Others 11 known compounds were identified by UHPLC-HRMS/MS. These compounds are being described for the first time in this species, with the exception of cadinene .

Preparation, characterization and antidermatophytic activity of free- and microencapsulated cinnamon essential oil.

Essential oils (EO) are effective natural antimicrobials but are susceptible to oxidation. Microencapsulation improves EO stability, reduces toxicity, and controls release. The aim of this study was preparation, characterization and antidermatophytic activity of free and microencapsulated cinnamon essential oil (MP).

Structural Characterization and Biological Evaluation of 18-Nor-ent-labdane Diterpenoids from Grazielia gaudichaudeana.

The phytochemical investigation of Grazielia gaudichaudeana aerial parts yielded 15 compounds, including diterpenes, triterpenes, sterols and flavonoids. With exception to ent-kaurenoic acid diterpenes, the compounds isolated are being described for the first time in this species. Some unusual H-NMR chemical shifts of 18-nor-ent-labdane (7-9) led us carry out a conformational analysis by theoretical calculations in order to support the experimental data.