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New melampolides from Schkuhria schkuhrioides
1Instituto de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Circuito Exterior, Coyoacán 04510, Mexico. delgado@servidor.unam.mx
Journal of Natural Products
|September 28, 1998
Summary
Three new melampolides were identified in Schkuhria schkuhrioides. Known compounds were also isolated, but the tested compounds showed no significant cytotoxic or antimicrobial activities.
Area of Science:
- Phytochemistry
- Natural Products Chemistry
- Medicinal Chemistry
Background:
- Schkuhria schkuhrioides is a plant species with potential for novel compound discovery.
- Melampolides are a class of sesquiterpene lactones with diverse biological activities.
Purpose of the Study:
- To isolate and characterize novel melampolides from Schkuhria schkuhrioides.
- To evaluate the cytotoxic and antimicrobial activities of isolated compounds.
Main Methods:
- Isolation of compounds using chromatographic techniques.
- Structure elucidation of new compounds via spectroscopic methods (NMR, MS).
- In vitro assays for cytotoxic and antimicrobial activity evaluation.
Main Results:
- Three new melampolides: (11R)-11,13-dihydro-schkuhriolide (7), (11S)-11,13-dihydro-schkuhriolide (8), and schkuhrioidiol (11) were identified.
- Six known constituents, including frutescin (1) and schkuhriolide (2), were also isolated.
- Compounds 1, 2, 4, 5, and 6 showed no significant cytotoxic or antimicrobial effects.
Conclusions:
- The study expands the knowledge of melampolide diversity in Schkuhria schkuhrioides.
- The isolated known compounds did not exhibit significant bioactivity in the tested assays.
- Further investigation into the biological potential of the newly discovered compounds is warranted.