Two New C -Diterpenoid Alkaloids from Delphinium shawurense.

Shawurenine C (1a) and D (1b), a new pair of regioisomeric C -diterpenoid alkaloids, and five known C -diterpenoid alkaloids (2-6) were isolated from the aerial part of Delphinium shawurense W. T. Wang.

Chemical components of var. and their cytotoxic and antibacterial activities.

Nineteen compounds, including seventeen alkaloids O-methylarmepavine (), (S)-6-methoxy-1-(4-methoxybenzyl)-2-methyl -1,2,3,4-tetrahydroisoquinolin-7-ol (), (+)-(IR,laR)-lahydroxymagnocurarin (), (6R,6aS,P)-(+)-corydine (), (+)-N-methyllaurotetanine (), magnoflorine (), 3-hydroxy-1,2-dimethoxy-5-methyl-5H-dibenzoindol-4-one (), imperialine (), crispine B (), (S)-1-(3-methoxyphenyl)-N-methylpropan-2-amine (), methyl 2- (acetamino)benzoate (), 2-carboxyoxanilic acid methylester (), 4-[2-(methoxycarbonyl) anilino]-4-oxobutanoic acid methyl ester (), N-methylcorydaldine (), N-methyl-6,7- dimethoxyisoquinolone (), (5,6,7,8)-5-amino-(2Z,4Z)-1,2,3-trihybuta-2,4-dienyloxypentane- 6,7,8,9-tetraol (), nicotinic acid (), and two megastigmane type compounds, S(+)- dehydrovomifoliol () and megastigmane (), were isolated from the Aconitum barbatum var. puberulum Ledeb. Compounds and were isolated from this plant for the first time, of which compound was isolated from natural source for the first time.

Diterpenoid alkaloids from Aconitum barbatum var. puberulum Ledeb.

Seven previously undescribed diterpenoid alkaloids, including five C-diterpenoid alkaloids, barpuberudine, barpubesines A-D, and two C-diterpenoid alkaloids, barpubenines A-B, along with 11 known diterpenoid alkaloids were isolated from the whole plant of Aconitum barbatum var. puberulum Ledeb. (Ranunculaceae).