Three new triterpenoid saponins, auriculatusaponins A, B, and C, along
with one known saponin, 3-O-beta-glucuronyl-olean-12-en-28-oic acid 2
8-(O-alpha-rhamnopyranosyl-(1 --> 2)-alpha-arabinopyranosyl) ester wer
e isolated from roots of Aster auriculatus. On the basis of spectral a
cid chemical evidence, auriculatusaponins A, B, and C were determined
as 3 eta-O-beta-glucuronyl-16-oxo-12-ene-28-noroleanane (1), 3 beta-O-
beta-glucuronyl-16 alpha-trans-feruloyloxy-12-en-oleanane (3), and 3-O
-beta-glucopyranosyl-16 alpha-hydroxy-olean-12-ene-28-oic acid 28-O-ca
rboxymethyl ester (4), respectively.