1H and 13C NMR spectra of 3,8-dimethoxyfuro[3,2-g]coumarin and maculine from Esenbeckia grandiflora Martius (Rutaceae).
One- and two-dimensional NMR experiments were used for the unambiguous assignment of the (1)H and (13)C NMR chemical shifts of the furoquinoline alkaloid maculine (1) and the new furanocoumarin 3,8-dimethoxyfuro[3,2-g]coumarin (2).
Nunes
F M
FM
Departamento de Química Orgânica e Inorgânica, Curso de Pós-Graduação em Química Orgânica, Universidade Federal do Ceará, Cx. Postal 6044, Fortaleza-CE, 60.450-970, Brazil.
Barros-Filho
B A
BA
de Oliveira
M C F
MC
Andrade-Neto
M
M
de Mattos
M C
MC
Mafezoli
J
J
Pirani
J R
JR
D002247:Carbon Isotopes; D003374:Coumarins / Q000737:chemistry*; D004149:Dioxoles / Q000737:chemistry*; D005663:Furans / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods* / Q000592:standards*; D008968:Molecular Conformation; D011522:Protons; D011804:Quinolines / Q000737:chemistry*; D012015:Reference Standards; D027821:Rutaceae / Q000737:chemistry*
C505824:3,8-dimethoxyfuro(3,2-g)coumarin; D002247:Carbon Isotopes; D003374:Coumarins; D004149:Dioxoles; D005663:Furans; D011522:Protons; D011804:Quinolines; C505825:maculine