title: Photoactivated insecticidal thiophene derivatives from Xanthopappus subacaulis.
abstract: Three new photoactivated insecticidal thiophene derivatives, xanthopappins A-C (1-3), were isolated from Xanthopappus subacaulis, along with three known thiophene acetylenes, 5-hydroxymethyl-2-(E)-hept-5-ene-1,3-diynylthiophene (4), 5-(1,2-dihydroxyethyl)-2-(E)-hept-5-ene-1,3-diynylthiophene (5), and 5-(1,2-diacetoxyethyl)-2-(E)-hept-5-ene-1,3-diynylthiophene (6). The structures of 1-3 were elucidated by spectroscopic methods. Compounds 1-6 exhibited significant photoactivated insecticidal activity against the fourth-instar larvae of the Asian tiger mosquito.
authors.affiliation: Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, South China Agriculture University, Wushan, Guangzhou 510640, People's Republic of China.
authors.forename: Yongqing
authors.initials: Y
authors.lastname: Tian
authors.forename: Xiaoyi
authors.initials: X
authors.lastname: Wei
authors.forename: Hanhong
authors.initials: H
authors.lastname: Xu
mesh_terms: D000330:Aedes / Q000187:drug effects*; D000818:Animals; D019659:Asteraceae / Q000737:chemistry*; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D007306:Insecticides / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D007814:Larva / Q000187:drug effects; D015394:Molecular Structure; D010777:Photochemistry / Q000379:methods; D010946:Plants, Medicinal / Q000737:chemistry*; D013876:Thiophenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology
chemical_list: D004365:Drugs, Chinese Herbal; D007306:Insecticides; D013876:Thiophenes; C513713:xanthopappin A; C513714:xanthopappin B; C513715:xanthopappin C