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A new macrocyclic spermidine alkaloid from the aerial part of Hyssopus cuspidatus Boriss.

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Hyssopus cuspidatus Boriss. grows in Xinjiang, China. A new macrocyclic spermidine alkaloid, namely hyssopusizine (1), along with sixteen known compounds were isolated and identified from the aerial parts of H.… Click to show full abstract

Hyssopus cuspidatus Boriss. grows in Xinjiang, China. A new macrocyclic spermidine alkaloid, namely hyssopusizine (1), along with sixteen known compounds were isolated and identified from the aerial parts of H. cuspidatus. Their structures were elucidated on the basis of spectroscopic data and comparison with the literature. Among them, fifteen compounds were isolated from H. cuspidatus for the first time. The absolute configuration of compound 1 was established by comparing the calculated and experimental ECD spectroscopic data. All isolated compounds were tested for their antioxidant and antimicrobial activities. Among them, compound 10 exhibited significant effects on ABTS free-radical scavenging activity with an IC50 value of 15.6 μM. Compounds 5-7 exhibited potent antioxidant activities against ABTS and DPPH. Most compounds exhibited moderate antimicrobial activities. Hyssopusizine (1) is the first macrocyclic spermidine alkaloid discovered from the Hyssopus genus.

Keywords: cuspidatus; hyssopus cuspidatus; spermidine alkaloid; macrocyclic spermidine

Journal Title: Natural product research
Year Published: 2022

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