Megastigmane, aliphatic alcohol and benzoxazinoid glycosides from Acanthus ebracteatus

1-octen-3-O-alpha-L-arabinopyranosyl-(1 -> 6)-beta-glucopyranoside, a minor substance from the leaves of Kalanchoe pinnata (Crassulaceae)

“…The chain was composed by eight carbons (C-1, 115.0 ppm; C-2, 139.7 ppm; C-3, 79.4 ppm; C-4, 33.9 ppm; C-5, 23.8 ppm; C-6, 31.3 ppm; C-7, 22.0 ppm and C-8, 13.3 ppm). The signals attributed to the aliphatic chain are in agreement with the literature data (Yoshikawa et al, 1998;Wang et al, 1998 andKanchanapoom et al, 2001). Our assignment was confi rmed unambiguously by 2D-NMR APT, HETCOR and COSY 1 H, 1 H data.…”

“…The 1-octen-3-ol glycosides reported until now have been isolated from plants belonging to few families such as Acanthaceae (Kanchanapoom et al, 2001), Fabaceae (Wang et al, 1998), Lamiaceae (Yamamura et al, 1998;Çali and Kirmizibekmez, 2004) and Orchidaceae (Yoshikawa et al, 1998). At our knowledge, there is no biological activity correlated with any of these compounds.…”

“…As far we know, only four other glycosides of 1-octen-3-ol were reported: the 1-octen-3-0-glucopyranosyl-(1 6)--glucopyranoside (Yoshikawa et al, 1998) (Yamamura et al, 1998;Kanchanapoom et al, 2001) and two triglycoside: (Kanchanapoom et al, 2001) and 1-octen-3-yl-O--apiofuranosyl- (1 6…”

Aliphatic Alcohol and Iridoid Glycosides from Asystasia intrusa

“…The distortionless enhancement by polarization transfer (DEPT) experiments indicated the presence of one methyl (␦ 14.5), five methylenes (␦ 23.7, 25.6, 33.1, 35.8, 116.9), as well as two methines (␦ 83.7, 140.6) of the aglycone moiety, which could be assigned to (3R)-1-octen-3-ol (matsutake alcohol) by comparing the spectral data with those in the literature. 2,18) The chemical shifts of compound 6 were almost the same as those of ebracteatoside B (6a), previously isolated from Acanthus ebracteatus, 2) except for the difference in the chemical shifts of the sugar chain ( Table 1) Fig. 1.…”

Fitotoxicidad De Aceites Esenciales Y Extractos Acuosos De Plantas Mediterráneas Para El Control De Arvenses

“…Son benzoxacinas producidas por diferentes especies de la familia Gramíneas, en las que tienen un rol protector (Niemeyer y Pérez, 1995), habiendo mostrado actividad antifúngica (Hofman y Hofmanová, 1971), antimicrobiana (Bravo y Lazo, 1993), insecticida (Argandoña et al, 1980) y fitotóxica (Macías et al, 2005). También se encuentran en especies de las familias Acantá-ceas (Kanchanapoom et al, 2001), Ranunculáceas (Özden et al, 1992) y Escrofulariáceas (Chen y Chen, 1976). Se almacenan en la planta en forma de glucósidos inactivos para evitar la autotoxicidad (Sicker et al, 2004).…”