Abstract
Chevalinulins A (1) and B (2), two indole diketopiperazine alkaloids containing an unprecedented spiro[bicyclo[2.2.2]octane-diketopiperazine] skeleton, together with a known analogue neoechinulin B (3), were isolated from the deep-sea cold-seep-derived fungus Aspergillus chevalieri CS-122. Their structures were determined by spectroscopic analysis, single-crystal X-ray diffraction, specific rotation (SR), and NMR calculations. Compounds 1 and 2 exhibited significant in vivo proangiogenic activity in transgenic zebrafish.
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