TITLE

Two New Tryptamine Derivatives, Leptoclinidamide and (-)-Leptoclinidamine B, from an Indonesian Ascidian Leptoclinides dubius

AUTHOR(S)
Yamazaki, Hiroyuki; Wewengkang, Defny S.; Nishikawa, Teruaki; Rotinsulu, Henki; Mangindaan, Remy E. P.; Namikoshi, Michio
PUB. DATE
June 2012
SOURCE
Marine Drugs;Jun2012, Vol. 10 Issue 6, p349
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Two new tryptamine-derived alkaloids, named as leptoclinidamide (1) and (-)-leptoclinidamine B (2), were isolated from an Indonesian ascidian Leptoclinides dubius together with C2-α-D-mannosylpyranosyl-L-tryptophan (3). The structure of 1 was assigned on the basis of spectroscopic data for 1 and its N-acetyl derivative (4). Compound 1 was an amide of tryptamine with two β-alanine units. Although the planar structure of 2 is identical to that of the known compound (+)-leptoclinidamine B (5), compound 2 was determined to be the enantiomer of 5 based on amino acid analysis using HPLC methods. Compounds 1 to 4 were evaluated for cytotoxicity against two human cancer cell lines, HCT-15 (colon) and Jurkat (T-cell lymphoma) cells, but none of the compounds showed activity.
ACCESSION #
72325520

 

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