New Canthin-6-one Alkaloids from Quassia amara.
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.
Barbetti
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P
Istituto di Chimica Farmaceutica e Tecnica Farmaceutica, Università degli Studi di Perugia, Via del Liceo, I-06100 Perugia, Italy.
Grandolini
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G
Fardella
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G
Chiappini
I
I
Mastalia
A
A