Two new triterpenoid saponins, loniceroside A and B, were isolated fro
m the aerial parts of Lonicera japonica. Their structures were establi
shed as 3-O-alpha-L-arabinopyranosyl hederagenin 28-O-alpha-L-rhamnopy
ranosyl beta-D-xylopyranosyl(1-->6)]-beta-D-glucopyranosyl ester and -
L-rhamnopyranosyl(1-->2)-alpha-L-arabinopyranosyl hederagenin l(1-->2)
-[beta-D-xylopyranosyl(1-->6)]-beta-D-gluc opyranosyl ester, respectiv
ely.