Natural and synthetic spirobutenolides and spirobutyrolactones

P Yadav, R Pratap, V Ji Ram - Asian Journal of Organic …, 2020 - Wiley Online Library
Spirobutenolides and spirobutyrolactones structural motifs are widespread in various natural
products that exhibit a broad array of biological activities. Additionally, their synthetic …

Zelkovamycins B–E, Cyclic Octapeptides Containing Rare Amino Acid Residues from an Endophytic Kitasatospora sp

X Hao, J Yu, Y Wang, JA Connolly, Y Liu, Y Zhang… - Organic …, 2020 - ACS Publications
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 …