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A new diphenyl ether with insecticidal activity from the mangrove endophytic fungus Aspergillus sp. GXNU-DY2-12
Meijing Tan1, Shichao Ju1, Fan He1
1State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), Collaborative Innovation Center for Guangxi Ethnic Medicine, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, China.
Abstract:
A new diphenyl ether pseudopithoether C (1), and five known compounds (2-6) were purified from secondary metabolites of the Aspergillus sp. GXNU-DY2-12 cultured in the rice medium. The new structure was analysed by NMR, HR-ESI-MS, and X-ray single crystal diffractometer. Compound 1 showed potent acetylcholinesterase (AChE) - inhibiting activity and its IC50 value was 1.02 μM. Notably, it demonstrated remarkable insecticidal efficacy against Diaphorina citri Kuwayama, achieving a mortality rate of 88% under standardised bioassay conditions.
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