Abstract
Four unusual cyclopeptides, zelkovamycins B–E (1–4), were isolated from an endophytic Kitasatospora sp. Zelkovamycin B was featured by an unprecedented 3-methyl-5-hydroxypyrrolidine-2,4-dione ring system linked to the cyclopeptide skeleton. Their structures and full configurations were established by spectroscopic analysis, Marfey’s method, and NMR calculations. A plausible biosynthetic pathway for zelkovamycins was proposed based on gene cluster analysis. Zelkovamycin E displayed potent inhibitory activity against H1N1 influenza A virus.
Original language | English |
---|---|
Journal | Organic Letters |
Volume | Articles ASAP |
Early online date | 20 Nov 2020 |
DOIs | |
Publication status | E-pub ahead of print - 20 Nov 2020 |