Abstract
Four new diketopiperazine alkaloids, citriperazines A-D were isolated from algae-derived Penicillium sp. KMM 4672. The structures of compounds 1–4 were determined using spectroscopic methods. The absolute configurations of compounds 1 and 4 were established by comparison of calculated and experimental ECD spectra. The cytotoxicity of compounds 1–4 against several human prostate cell lines was evaluated.
Graphical Abstract
Acknowledgements
The study was supported by the Russian Foundation for Basic Research (Grant No 18-34-00621).
Disclosure statement
No potential conflict of interest was reported by the authors.