Avijit Banerji

TL;DR: Two more indolic bases, rhazinine and R1, were shown to be identical with antirhine and geissoschizine respectively and the biogenetic significance of the occurrence of the latter is discussed.

TL;DR: The bioassay guided fractionation of the n-hexane extract of the seeds of Murraya koenigii Spreng resulted in the isolation of three bioactive carbazole alkaloids, kurryam (I), koenimbine (II) and koenine (III).

TL;DR: In this article, two new amides, aurantiamide and its acetate, were isolated from Piper aurantiacum and their structures were determined as N-(N′-benzoyl-S-phenylalaninyl)-S −phenyl-alaninol and S −phenyloninol, respectively, from chemical and spectroscopic studies.

TL;DR: Alstonia scholaris: The structure of the indole alkaloid nareline as discussed by the authors was deduced by single crystal X-ray diffraction and its structure 2 represents the absolute configuration, and the spectroscopic data of 2 and its derivatives as well as their chemical behavior support this structure.

TL;DR: In this article, two unsaturated amides, retrofractamides A and C, were isolated from the total aboveground parts of Piper retroractum and were shown to be N -isobutyl-9(3′,4′-methylenedioxyphenyl)2 E,4 E,8 E -nonatrienamide from spectroscopic and chemical investigations.