title: Antimicrobial benzopyrans from the receptacle of sunflower.
abstract: The antimicrobial substances in sunflower (Helianthus annuus) were investigated. Two antifungal benzopyran derivatives, 6-acetyl-2,2-dimethyl-1,2-benzopyran (1) and 6-acetyl-7-hydroxy-2,2-dimethyl-1,2-benzopyran (2), were isolated from the ethanol extract of sunflower receptacles. The antimicrobial activities of isolated compounds 1 and 2 and their related compounds (precocenes) were evaluated by the paper disk method, using Pyricularia oryzae as the test fungus.
authors.affiliation: Department of Bioscience and Technology, School of Engineering, Hokkaido Tokai University, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Satoh
authors.forename: H
authors.initials: H
authors.lastname: Utamura
authors.forename: M
authors.initials: M
authors.lastname: Ishizuka
authors.forename: N
authors.initials: N
authors.lastname: Endo
authors.forename: M
authors.initials: M
authors.lastname: Tsuji
authors.forename: H
authors.initials: H
authors.lastname: Nishimura
mesh_terms: D000890:Anti-Infective Agents / Q000302:isolation & purification* / Q000494:pharmacology; D000935:Antifungal Agents / Q000302:isolation & purification / Q000494:pharmacology; D001578:Benzopyrans / Q000302:isolation & purification* / Q000494:pharmacology; D006368:Helianthus / Q000737:chemistry* / Q000648:ultrastructure; D008826:Microbial Sensitivity Tests
chemical_list: D000890:Anti-Infective Agents; D000935:Antifungal Agents; D001578:Benzopyrans