Pyrrolizidine alkaloids from Jacobaea vulgaris Gaertn and theoretical studies on intramolecular interactions.
Aikebaier JumaiGuo-An ZouGe-Yu LiuHaji Akber AisaPublished in: Natural product research (2023)
Two undescribed pyrrolizidine alkaloids, 13-dehydrosenkirkine ( 1 ) and chloromethylretrorsine ( 2 ), along with three known analogues, onetine ( 3 ), retrorsine ( 4 ), and usaramine N -oxide ( 5 ), were isolated from Jacobaea vulgaris Gaertn. The structures of the undescribed compounds were elucidated by extensive spectrometric and spectroscopic techniques, including HRESIMS, NMR, calculated 13 C-NMR DP4+ analysis and comparison with experimental and calculated ECD spectra. The undescribed compounds were evaluated for their antitumour activity against HT29, HeLa, and HepG2 cells. In addition, the intramolecular interactions and quadrupolar couplings were revealed by investigating the geometrical and electronic properties of three typical otonecine-type PAs in DFT theory.
Keyphrases
- molecular docking
- high resolution
- magnetic resonance
- solid state
- density functional theory
- energy transfer
- molecular dynamics simulations
- liquid chromatography
- mass spectrometry
- high performance liquid chromatography
- case control
- gas chromatography
- molecular dynamics
- cell proliferation
- clinical evaluation
- crystal structure
- solid phase extraction
- pi k akt