title: New Canthin-6-one Alkaloids from Quassia amara.
abstract: From the wood of QUASSIA AMARA L. (Simarubaceae) two new canthin-6-one alkaloids have been isolated and their structures determined as 3-methyl-4-methoxy-5-hydroxycanthin-2,6-dione ( 1) and 4-methoxy-5-hydroxycanthin-6-one 3-, N-oxide ( 2) by spectroscopic and chemical methods. 3-Methylcanthin-5,6-dione ( 3) has been also isolated and identified for the first time from this source.
authors.affiliation: Istituto di Chimica Farmaceutica e Tecnica Farmaceutica, Università degli Studi di Perugia, Via del Liceo, I-06100 Perugia, Italy.
authors.forename: P
authors.initials: P
authors.lastname: Barbetti
authors.forename: G
authors.initials: G
authors.lastname: Grandolini
authors.forename: G
authors.initials: G
authors.lastname: Fardella
authors.forename: I
authors.initials: I
authors.lastname: Chiappini
authors.forename: A
authors.initials: A
authors.lastname: Mastalia