Saponins and Sapogenins from Brachiaria decumbens Stapf
نویسندگان
چکیده
Quatro saponinas esteroidais e três sapogeninas foram identificadas das partes aéreas de Brachiaria decumbens. As estruturas desses compostos foram estabelecidas através de métodos químicos e espectroscópicos (RMN de H e C, HMBC, HMQC) como 3 -metóxi-lanost-9(11)-eno (1), diosgenina (2a), iamogenina (2b), 3-O-D-glicopiranosil-24(S)-etil-22E-deidrocolesterol (3a), 3O-D-glicopiranosil-24(R)-etil-22E-deidrocolesterol (3b), dioscina (4a) e 3-O-{ -Lramnopiranosil-(1 4)-[ -L-ramnopiranosil-(1 2)]-D-glicopiranosil}-25(S)-espirost-5-en-3 -ol (4b). Esses compostos foram isolados pela primeira vez em B. decumbens, sendo que o composto 4b não foi ainda descrito na natureza conforme revisão realizada.
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