Tedaniophorbasins A and B-Novel Fluorescent Pteridine Alkaloids Incorporating a Thiomorpholine from the Sponge Tedaniophorbas ceratosis.
Asadhawut HiranratDarren C HollandWilawan MahabusarakamJohn N A HooperVicky Marie AveryAnthony R CarrollPublished in: Marine drugs (2021)
Two new fluorescent pteridine alkaloids, tedaniophorbasins A (1) and B (2), together with the known alkaloid N-methyltryptamine, were isolated, through application of mass directed purification, from the sponge Tedaniophorbas ceratosis collected from northern New South Wales, Australia. The structures of tedaniophorbasins A and B were deduced from the analysis of 1D/2D NMR and MS data and through application of 13C NMR DFT calculations. Tedaniophorbasin A possesses a novel 2-imino-1,3-dimethyl-2,3,7,8-tetrahydro-1H-[1,4]thiazino[3,2-g]pteridin-4(6H)-one skeleton, while tedaniophorbasin B is its 2-oxo derivative. The compounds show significant Stokes shifts (~14,000 cm-1) between excitation and emission wavelengths in their fluorescence spectra. The new compounds were tested for bioactivity against chloroquine-sensitive and chloroquine-resistant strains of the malaria parasite Plasmodium falciparum, breast and pancreatic cancer cell lines, and the protozoan parasite Trypanosoma brucei brucei but were inactive against all targets at 40 µM.
Keyphrases
- plasmodium falciparum
- density functional theory
- high resolution
- solid state
- quantum dots
- magnetic resonance
- living cells
- fluorescent probe
- energy transfer
- mass spectrometry
- molecular dynamics
- escherichia coli
- multiple sclerosis
- electronic health record
- ms ms
- molecular dynamics simulations
- label free
- big data
- molecular docking
- machine learning
- crystal structure
- water soluble