Abstract
A new natural indole, vibrindole B (1), together with known analogs, vibrindole A (2), trisindoline (3), norharmane (4), and 3-(hydroxyacetyl)indole (5), produced by the bacterium Pseudovibrio denitrificans P81, were isolated from a sponge, Aaptos species. The structures of indoles 1 to 5 were established by spectroscopic methods. The proposed biosynthetic pathway of 1 to 5 is also discussed, starting from tryptophan. Moreover, indoles 1 to 3 were found to exhibit cytotoxicity toward T24 tumor cells with IC50 values of 1.71 ± 0.11, 4.53 ± 0.14, and 2.26 ± 0.26 µM, respectively.
Original language | English |
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Journal | Natural Product Communications |
Volume | 16 |
Issue number | 9 |
DOIs | |
State | Published - 2021 |
Bibliographical note
Publisher Copyright:© The Author(s) 2021.
Keywords
- Aaptos
- Pseudovibrio
- cytotoxicity
- sponge
- vibrindole