It was found that [beta]-glucosidase-producing LAB strains exhibited a higher degree of [beta]-glucosidase activity and significantly higher aglycone
(22) Moreover, a peak at [R.sub.t]=73.3 showed a deprotonated ion [[M-H].sup.-] at m/z 463 and [MS.sup.n] ions at m/z 301 due to loss of glucose moiety (-m/z 162) and equivalent to quercetin aglycone
Flavonoid glycosides hydrolyzed to aglycone
forms by a broad-specific [beta]-glucosidase enzyme (BS[beta]G) in enterocytes.
Notable secoiridoids in olives include oleuropein, ligstroside, and dimethyl oleuropein, as well as their phenolic derivatives and hydrolysis products, which include oleuropein aglycone
, ligstroside aglycone
, oleacein, and oleocanthal , compounds that are either known to be bitter or are considered likely bitter .
In our results, luteolin-7-O-[beta]-D-glucoside (2) (monoglycosylation) showed to be higher than luteolin (10) (aglycone
) on RLAR.
The GUSB substrate was analogous to that for NAGLU in the composition of the aglycone
but differed from it by being a [beta]-glucoside and having a [C.sub.4] secondary amide (Fig.
Niu et al., "Mangiferin and its aglycone
, norathyriol, improve glucose metabolism by activation of AMP-activated protein kinase," Pharmaceutical Biology, vol.
A reddish brown color formed which indicated the presence of steroidal aglycone
part of the glycoside.
These fragment ions suggested that the aglycone
is apigenin (270) substituted with two hexose (162+ 162).
Icaritin is the common aglycone
with many biological effects, especially antiosteoporosis activities [5, 7].
Epidoxorubicin hydrochloride (EP) is the most commonly used anthracycline antitumor antibiotic consisting of a tetracyclic quinolid aglycone
connected by a glycoside bond with an amino sugar--L-acosamine.
These results demonstrate that SM extract is absorbed and rapidly enters the circulatory system as apigenin, which is the aglycone
of flavone glycosides.
Molecule of saponin consists of the carbohydrate part and the aglycone
, which is termed sapogenin.
Regarding compound (13), the [sup.13]C NMR spectrum (Table 1) exhibited one carbonyl carbon signal at [delta] 168.28, two sp2 carbon signals at [delta]: 146.50, 114.99, nine methines, nine quaternary aromatic carbon signals, six oxygenated carbon signals due to the sugar moiety along with the aliphatic signals at [delta] 86.99, 86.41, 55.04, 54.80, 71.99 and 71.96 belonging to the aglycone