Abstract Several isoquinoline alkaloids (1-18), which have basic chemical structures as
protoberberine and aporphine skeletones, were evaluated for their inhibitory activities on …

In a bioassay-guided search for acetylcholinesterase (AChE) inhibitors from Chinese natural
resources, eight isoquinoline alkaloids, tetrahydropalmatine (1), corydaline (2), protopine …

Two new isoquinoline alkaloids (1 and 2) along with fourteen known alkaloids (3–16) were
isolated from Corydalis racemosa (Thunb.) Pers. Their structures were elucidated by …

Coptis chinensis has been used as a medicinal herb in traditional oriental medicine. In this
study, chemical investigation of a water extract of C. chinensis identified two new quaternary …

Tubers of Corydalis cava were extracted with ethanol and fractionated using n-hexane,
chloroform and ethanol. Repeated column chromatography, preparative TLC and …

A new benzyldihydroisoquinoline alkaloid (1) was isolated from the tubers of Corydalis cava
and named corylucinine. Additionally, 8-trichloromethyl-7, 8-dihydropalmatine (2), an …

Eight previously undescribed isoquinoline alkaloids, mucroniferanines HM, together with 16
known isoquinoline alkaloids, were isolated from Corydalis mucronifera Maxim.. The …

New lycoctonine-type dual cholinesterase inhibitor, swatinine-C (1), along with three known
norditerpenoid alkaloids, hohenackerine (2), aconorine (5) and lappaconitine (6) and two …

Phytochemical investigation on Cocculus pendulus (JR & G. FORST.) resulted in the
isolation of two new and three known bisbenzylisoquinoline alkaloids. The structures of the …

In a bioassay-guided search for acetylcholinesterase inhibitors from Korean natural
resources, four isoquinoline alkaloids, corynoxidine (1), protopine (2), palmatine (3), and …