Two new alkaloids, including one benzophenanthridine type, dehydroambiguanine A (1)
and one isoquinoline type, ambiguanine J (2) together with four (3–6) known alkaloids were …

Eight undescribed alkaloids named corydalisine DK (1–7), including one isoquinoline
benzopyranone alkaloid (1), one benzocyclopentanone alkaloid (2), four benzofuranone …

Chemical investigation of the tubers of Corydalis ternata resulted in the isolation and
characterization of four new benzylisoquinoline alkaloids, epi-coryximine (1) and …

Methods The compounds were isolated by silica gel column chromatography and
recrystallization. Their structures were identified by spectroscopic analysis (NMR) and …

The chemical investigation on Corydalis balansae resulted in the isolation of three previous
undescribed compounds (1, 10, and 11) and 17 known compounds. Compound 1 and 2 …

Two new quaternary protoberberine alkaloids, namely corydayanine (1) and yanhusuine (2),
were isolated from the tubers of Corydalis yanhusuo. On the basis of extensive chemical and …

Phytochemical investigation of the twigs of Corylopsis coreana afforded 10 phenolic
compounds, bergenin (1), 6'-O-galloylbergenin (2), 3'-O-galloylbergenin (3),(-)-catechin (4) …

Seven hexahydrobenzophenanthridine-type alkaloids, Ambiguanine A–G, along with eight
known alkaloids, were isolated from tubers of Corydalis ambigua var. amurensis. Their …

Two new alkaloids, named 1, 1-dimethyl-6-methoxy-7-hydroxyl-1, 2, 3, 4-
tetrahydroisoquinoline (1) and (1 R)-(4-hydroxybenzyl)-7-hydroxyl-8-O-β-d-glucopyranosyl …

To study the chemical constituents of the herb of Corydalis saxicola Bunting. Silica gel
column chromatography and Sephadex LH-20 were used to isolate the compounds, and …