title: Synthesis and the biological evaluation of the structural units of drummondin C.
abstract: Drummondin C (1) is an antibiotic isolated from a bioassay-directed fractionation of Hypericum drummondii (Grev. & Hook.)T.&G. It showed significant activity against the Gram-positive bacteria Staphylococcus aureus and Bacillus subtilis and the acid-fast bacterium Mycobacterium smegmatis. Two structural units of drummondin C, the 8-acetyl-5,7-dihydroxy-2,2-dimethylchromene (6) and 5-acetyl-3-methyl-filicinic acid (9), were synthesized to determine the relative importance of the two substructure portions to the antibiotic activity of the compound. The low antimicrobial activity of 6 and 9 demonstrates the necessity of both units for the antibiotic activity of drummondin C.
authors.affiliation: Department of Pharmacognosy, School of Pharmacy, University of Mississippi, Oxford.
authors.forename: H
authors.initials: H
authors.lastname: Jayasuriya
authors.forename: J K
authors.initials: JK
authors.lastname: Baker
authors.forename: A M
authors.initials: AM
authors.lastname: Clark
authors.forename: J D
authors.initials: JD
authors.lastname: McChesney
mesh_terms: D000900:Anti-Bacterial Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D001578:Benzopyrans / Q000138:chemical synthesis* / Q000494:pharmacology; D003510:Cyclohexanes / Q000138:chemical synthesis* / Q000494:pharmacology; D008826:Microbial Sensitivity Tests
chemical_list: D000900:Anti-Bacterial Agents; D001578:Benzopyrans; D003510:Cyclohexanes; C073471:drummondin C