Chemical constituents of Tolpis species.
Phytochemical research of two Tolpis species, T. webbii and T. sp., led to the isolation of three new compounds: 2,4'-dihydroxy-4-methoxybenzophenone (1) and the triterpenes 21 alpha, 22 alpha-epoxy-20 alpha-hydroxy-20(30)-dihydrotaraxasterol (2) and 3beta-hydroxytaraxaster-20-en-30-oic acid (3) together with 16 known compounds. The structures of the new compounds were elucidated by means of extensive IR, NMR, MS and X-ray analysis and by comparison of data reported in the literature.
Triana
Jorge
J
Departamento de Química, Universidad de Las Palmas de Gran Canaria, Campus de Tafira, 35017, Las Palmas de Gran Canaria, Gran Canaria, Canary Islands, Spain.
López
Mariana
M
Pérez
Francisco Javier
FJ
Platas
Javier González
JG
Estévez
Francisco
F
León
Juan Francisco
JF
Hernández
Juan Carlos
JC
Brouard
Ignacio
I
Bermejo
Jaime
J
D019659:Asteraceae / Q000737:chemistry*; D001577:Benzophenones / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D035261:Plant Components, Aerial; D010936:Plant Extracts / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
C544793:2,4'-dihydroxy-4-methoxybenzophenone; C544794:21 alpha, 22 alpha-epoxy-20 alpha-hydroxy-20(30)-dihydrotaraxasterol; C544795:3beta-hydroxytaraxaster-20-en-30-oic acid; D001577:Benzophenones; D010936:Plant Extracts; D014315:Triterpenes