Thirteen new sesquiterpenes, pulicanadiene A (1), B (2), and C (3), pulicanone (4), pulicanol (5), pulicanarals A (6), B (7), and C (8), pulicanadienals A (9) and B (10), pulicanadienol (11), and pulioplopanones A (12) and B (13), and seven known compounds, stigmasterol, ergosterol peroxide, calenduladiol, 7,4'-di-O-methyldihydrokaempferol, 5,7-dihydroxy-3,3',4'-trimethoxyflavone, dihydroquercetin 7,3'-dimethyl ether, and 6,15alpha-epoxy-1beta,4beta-dihydroxyeudesmane, were isolated from Pulicaria canariensis. Compound 4a showed cytotoxicity on the human myeloid leukemia cell line HL-60. The cytotoxicity was caused by induction of apoptosis as determined by microscopy of nuclear changes, activation of caspases, and the cleavage of poly(ADP-ribose) polymerase-1.
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Secondary metabolites from two species of Pulicaria and their cytotoxic activity.
Chem Biodivers
November 2011
Departamento de Química, Universidad de Las Palmas de Gran Canaria, Unidad Asociada al CSIC, Campus de Tafira, SP, Las Palmas de Gran Canaria.
Two new compounds, the sesquiterpene (1E,5E)-8β-acetoxy-4α-hydroxy-7βH-germacra-1(10),5-dien-14-oic acid (2), and a nor-sesquiterpene, (5E)-8β-acetoxy-4α-hydroxy-7βH-germacr-5-en-10-one (3), were isolated from Pulicaria canariensis ssp. lanata, along with ten known compounds, including the flavonoid 5,3'-dihydroxy-3,7,4'-trimethoxyflavone (4). From Pulicaria burchardii, we isolated seven known compounds; the physical and spectroscopic data of the triterpenoid 3β-hydroxytaraxaster-20-en-30-al (1) are reported.
View Article and Find Full Text PDFSesquiterpenoids from Pulicaria canariensis and their cytotoxic activities.
J Nat Prod
April 2005
Departamento de Química, Universidad de Las Palmas de Gran Canaria, Campus de Tafira, 35017 Las Palmas de Gran Canaria, Spain.
Thirteen new sesquiterpenes, pulicanadiene A (1), B (2), and C (3), pulicanone (4), pulicanol (5), pulicanarals A (6), B (7), and C (8), pulicanadienals A (9) and B (10), pulicanadienol (11), and pulioplopanones A (12) and B (13), and seven known compounds, stigmasterol, ergosterol peroxide, calenduladiol, 7,4'-di-O-methyldihydrokaempferol, 5,7-dihydroxy-3,3',4'-trimethoxyflavone, dihydroquercetin 7,3'-dimethyl ether, and 6,15alpha-epoxy-1beta,4beta-dihydroxyeudesmane, were isolated from Pulicaria canariensis. Compound 4a showed cytotoxicity on the human myeloid leukemia cell line HL-60. The cytotoxicity was caused by induction of apoptosis as determined by microscopy of nuclear changes, activation of caspases, and the cleavage of poly(ADP-ribose) polymerase-1.
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