Zobrazeno 1 - 10
of 174
pro vyhledávání: '"Otília Deusdênia L. Pessoa"'
Autor:
Francisco das Chagas L. Pinto, Maria da Conceição M. Torres, Edilberto R. Silveira, Otília Deusdênia L. Pessoa, Raimundo Braz-Filho, Maria Lenise da Silva Guedes
Publikováno v:
Química Nova, Vol 36, Iss 8, Pp 1111-1115 (2013)
The chemical investigation of the stem EtOH extract of S. buddleifolium resulted in the isolation of terpenoids, amides, lignans and a steroidal alkaloid. Based on HRMS, IR and ¹H and 13C NMR data analysis, the structures of the isolated compounds w
Externí odkaz:
https://doaj.org/article/3c11fe0d34264650aa4f8c4a08a01146
Autor:
Adalva Lopes Machado, Fabiana Martins Aragão, Paulo N. Bandeira, Hélcio Silva dos Santos, Maria Rose Jane R. Albuquerque, Otília Deusdênia L. Pessoa, Edilberto R. Silveira, Edson Paula Nunes, Raimundo Braz-Filho
Publikováno v:
Química Nova, Vol 36, Iss 4, Pp 540-543 (2013)
The chemical investigation of hexane and ethanol extracts from the aerial parts of Vernonia scorpioides resulted in the isolation and characterization of a new polyacetylene lactone, rel-4-dihydro-4β-hydroxy-5a-octa-2,4,6-triynyl-furan-2-(5H)-one, a
Externí odkaz:
https://doaj.org/article/f5ea38298ce348659f94193518e08bba
Publikováno v:
Química Nova, Vol 34, Iss 2, Pp 268-271 (2011)
A new flavone named 3,4',5,6-tetramethoxy-[2'',3'':7,8]furanoflavone besides the known flavonoids (2S,3R,4S)-3,4,5,8-tetramethoxy-[2'',3'':6,7]-furanoflavan, 3,6-dimethoxy-2'',2''-dimethylcromene-[2'',3'':7,8] -flavone, 3,5,6-trimethoxy-[2'',3'':7,8]
Externí odkaz:
https://doaj.org/article/6047cfcdb37042b7b19921ef3abc560d
Autor:
Francisco das Chagas L. Pinto, Daniel Esdras de A. Uchoa, Edilberto R. Silveira, Otília Deusdênia L. Pessoa, Raimundo Braz-Filho, Fernanda M. e Silva, Phellipe N. E. T. Theodoro, Laila S. Espíndola
Publikováno v:
Química Nova, Vol 34, Iss 2, Pp 284-288 (2011)
Two glycoalkaloids: solamargine and solasonine; three flavonoids: tiliroside, 7-O-α-L-ramnopyranosyl-kaempferol and 3-O-[ß-D-glucopyranosyl-(1→6)-α-L-ramnopyranosyl]-7- O-α-L-ramnopyranosyl-kaempferol, in addition to the tripeptide Leu-Ile-Val,
Externí odkaz:
https://doaj.org/article/4141d946baba4f959e4e1f1a4164cadd
Autor:
Regina Ferreira Gomes, Hélcio Silva dos Santos, Maria Rose Jane R. Albuquerque, Otília Deusdênia L. Pessoa, Leticia V. Costa Lotufo, Claudia do Ó Pessoa, Manoel Odorico de Moraes, Felipe A. R. Rodrigues
Publikováno v:
Química Nova, Vol 33, Iss 5, Pp 1122-1125 (2010)
The phytochemical investigation of the ethanol extract from the aerial parts of Blainvillea rhomboidea (Asteraceae) resulted in the isolation and characterization of 8β-tigloyloxy-grazielia acid, together with the flavonoids derrone, acacetin, luteo
Externí odkaz:
https://doaj.org/article/35c730a87c314f4889207bec09c55692
Constituintes químicos de Vernonia chalybaea mart. Chemical constituents of Vernonia chalybaea mart.
Autor:
Francisco José da Costa, Paulo N. Bandeira, Maria Rose Jane R. Albuquerque, Otília Deusdênia L. Pessoa, Edilberto R. Silveira, Raimundo Braz-Filho
Publikováno v:
Química Nova, Vol 31, Iss 7, Pp 1691-1695 (2008)
The chemical investigation of the hexane and ethanol extracts from aerial parts of Vernonia chalybaea conducted to the isolation and characterization of a new aliphatic tetrahydroxyl ether, along with a series of known compounds such as 4 α,10 α-ep
Externí odkaz:
https://doaj.org/article/4d9c58832d1a4d638e8b2b836378d262
Autor:
Renata P. dos Santos, Maria Teresa Salles Trevisan, Edilberto R. Silveira, Otília Deusdênia L. Pessoa, Vânia Maria M. Melo
Publikováno v:
Química Nova, Vol 31, Iss 1, Pp 53-58 (2008)
The chemical composition of the essential oils from leaves and fruits of Triphasia trifolia was analyzed by GC-FID and GC-MS. The major constituents of oil obtained from leaves were sabinene (35.4%) and myrcene (34.1%), while the prevalent compounds
Externí odkaz:
https://doaj.org/article/5e025a4675614996a624eb3073078dce
Autor:
Jose Galberto M. Costa, Otília Deusdênia L. Pessoa, Francisco José Q. Monte, Eveline A. Menezes, Telma Leda G. Lemos, Raimundo Braz-Filho
Publikováno v:
Química Nova, Vol 28, Iss 4, Pp 591-595 (2005)
Two new compounds, 5 and 8, and an epimeric mixture 4a/4b were isolated from hardwood of Auxemma glazioviana. Their structures and relative configurations were determined by modern spectroscopic analysis to be rel-10alpha,11alpha-epoxy-11beta-ethoxy-
Externí odkaz:
https://doaj.org/article/f455c15ddcf946b7bbf09c0fe30ab82a
Autor:
Maria Rose Jane R. Albuquerque, Elnatan B. Souza, Maria Usileide D.S. Lins, Nadja A.P. Nogueira, Telma Leda G. Lemos, Edilberto R. Silveira, Otília Deusdênia L. Pessoa
Publikováno v:
ARKIVOC, Vol 2004, Iss 6, Pp 59-65 (2004)
Externí odkaz:
https://doaj.org/article/7bd0c2759bb64bfbb72936f1117c21af
Autor:
Ana Isabel V. Maia, Maria Conceição M. Torres, Otília Deusdênia L. Pessoa, Jane Eire S. A. de Menezes, Sônia Maria O. Costa, Vanessa Lúcia R. Nogueira, Vânia Maria Maciel Melo, Elnatan B. de Souza, Maria Gilvânia B. Cavalcante, Maria Rose Jane R. Albuquerque
Publikováno v:
Química Nova, Vol 33, Iss 3, Pp 584-586 (2010)
The chemical composition of the essential oils, obtained by hidrodistillation, from leaves of two Vernonia species (V. remotiflora and V. brasiliana), was determined by GC-FID and GC-MS. Both essential oils were predominantly constituted by sesquiter
Externí odkaz:
https://doaj.org/article/a2723a4b72a744e49839a7616dc5d15c