Subsequently, the compound of formula II is made to reacted with an acid chloride in the presence of a base (e.g. pyridine) followed by heating to obtain a compound of formula III. The resultant compound of formula III is treated with a halogenating agent e.g. POCl3 or PCl5 in an ...
with a (C1 -C3)alkylthio group being preferred; a (C2 -C4)alkenyloxy group with an allyloxy group being preferred; a (C2 -C4)alkynyloxy group with a propargyloxy group being preferred; a (C3 -C6)cycloalkoxy group in which the cycloalkyl moiety thereof may be substituted with one or ...
Compound K (CK), a ginsenoside with high bioavailability, is present at low levels in wild-simulated ginseng leaves (WSGL). WSGL contains the CK precursors, Rd and F2, in amounts up to 26.4 ± 0.4 and 24.1 ± 1.9 mg/g extract, respectively. In this study, CK production ...