title: New Sesquiterpene Lactones and Other Constituents from Helianthuspetiolaris
abstract: Three new sesquiterpene lactones, 11alpha,13-dihydroxydehidrocostuslactone (1), the unusual 5, 10-epoxygermacranolide 4,15-anhydrohelivypolide (2), and 3-methoxy-1,2-anhydridoniveusin A (4), together with the 5,10-epoxygermacranolide helivypolide, four known 3,10-furanoheliangolides, and five known kaurane- and trachylobane-type diterpenes, have been isolated from Helianthus petiolaris.
authors.affiliation: Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Instituto Multidisciplinario de Biología Vegetal (IMBIV), CONICET-UNC, Agencia Postal 4, Casilla 61, 5000 Córdoba, Argentina.
authors.initials: KM
authors.lastname: Meragelman
authors.initials: LA
authors.lastname: Espinar
authors.initials: VE
authors.lastname: Sosa