químicos das folhas de Qualea grandiflora: atribuição dos dados de RMN de dois flavonóides glicosilados acilados diastereoisoméricos Chemical constituents from leaves of the Qualea grandiflora: attribution of the NMR data of two diastereoisomeric acylated flavonoid glycosids

• Published in: Química nova Vol. 31; no. 6; pp. 1481 - 1484
• Main Authors: Mariane Cruz Costa Ayres, Samuel Portela Escórcio, Danielly Albuquerque da Costa, Mariana H. Chaves, Gerardo Magela Vieira Júnior, Alberto J. Cavalheiro
• Format: Journal Article
• Language: English
• Published: Sociedade Brasileira de Química 01-01-2008
• Subjects: acylated kaempferol glycosids; Qualea grandiflora; Vochysiaceae
• DOI: 10.1590/S0100-40422008000600038
• EISSN: 1678-7064
• ISSN: 0100-4042

Phytochemical investigation from leaves of the Qualea grandiflora (Vochysiaceae) resulted in the isolation and identification of kaempferol-3-O-α-L-(4"-E-p-coumaroyl)-rhamnoside, kaempferol-3-O-α-L-(4"-Z-p-coumaroyl)-rhamnoside, squalene, phytol, lupeol, α-amyrin, β-amyrin, sitosterol, sitostenone, sitosterol-3-O-β-D-glucopyranoside, ursolic and oleanolic acids. The structures of the compounds were identified by 1D- and 2D-NMR experiments, mass and UV spectrometry and comparison with literature data.