Artigo de Periódico
Steroids and flavonoids of Porcelia macrocarpa
Fecha
2004Registro en:
0103-5053
v. 15, n. 4
Autor
Chaves, Mariana Helena
Roque, Nídia Franca
Ayres, Mariane Cruz Costa
Chaves, Mariana Helena
Roque, Nídia Franca
Ayres, Mariane Cruz Costa
Institución
Resumen
Three mixtures of steroids (1a+1b, 2a+2b and 3a+3b) and two flavonoid glycosides (4 and 5) were isolated from the ethanol extract of branches of Porcelia macrocarpa (Warm.) R. E. Fries (Annonaceae). The steroids Stigmasta-4,25-dien-3-one (2a) and (22E)-Stigmasta-4,22,25-trien-3-one (2b) are news. The structures were elucidated by NMR and MS data and comparison with literature data of model compounds.