Unequivocal assignments of flavonoids from Tephrosia sp. (Fabaceae).
(1)H and (13)C NMR chemical shifts of praecansone B, pongaflavone and dehydrorotenone isolated from Tephrosia egregia Sandw and obovatin from T. toxicaria Pers. were unambiguously assigned by 1D and 2D NMR experiments including (1)H, (1)H COSY, gHMQC and gHMBC, allowing the correction of literature assignments.
Arriaga
A M C
AM
Curso de Pós-graduação em Química, Departamento de Química Orgânica e Inorgânica, Universidade Federal do Ceará, Cx Postal 12200, CEP 60451-970, Fortaleza-CE, Brazil. angelamcarriaga@yahoo.com.br
Lima
J Q
JQ
Vasconcelos
J N
JN
de Oliveira
M C F
MC
Andrade-Neto
M
M
Santiago
G M P
GM
Uchoa
D E A
DE
Malcher
G T
GT
Mafezoli
J
J
Braz-Filho
R
R
D002247:Carbon Isotopes; D047309:Flavones / Q000737:chemistry*; D005419:Flavonoids / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D011522:Protons; D012015:Reference Standards; D013237:Stereoisomerism; D031304:Tephrosia / Q000737:chemistry*
D002247:Carbon Isotopes; D047309:Flavones; D005419:Flavonoids; D011522:Protons; C541867:dehydrorotenone; C541868:pongaflavone; C541866:praecansone B