A further new species for the genus Ananteris Thorell, 1891 (Scorpiones: Ananteridae) from a poorly prospected region of Brazilian Amazonia

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  A further new species for the genus Ananteris Thorell, 1891 (Scorpiones: Ananteridae) from a poorly prospected region of Brazilian Amazonia Abstract  A new species of the genus Ananteris Thorell, 1891 is described from the region which today defines the ‘Reserva Biológica do Río Trombetas’ in the state of Pará, Brazil. The collection of the unique specimen, presently study, took place previously to the definition of this reserve, in a joint field trip with a team of the Instituto Brasileiro de Desenvolvimento Florestal (IBDF). Ananteris antoni sp. n. is described based on one female specimen collected in a zone of dense humid forest, under death log. With this new description, the number of Ananteris species known for the scorpion fauna of Brazil is now raised to 33. Lourenço W. R., 2026. – A further new species for the genus Ananteris Thorell, 1891 (Scorpiones: Ananteridae) from a poorly prospected region of Brazilian Amazonia. Faunitaxys, 14(63): 1 – 5.  https://doi.o...

Structural Optimization, Fungicidal Activities Evaluation and Structure-activity Relationship of Guanidine Derivatives from Buthus martensii Karsch

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Structural Optimization, Fungicidal Activities Evaluation and Structure-activity Relationship of Guanidine Derivatives from Buthus martensii Karsch

Abstract

A guanidine compound was isolated and identified from Buthus martensii Karsch. Based on its characteristic structure, we used it as a lead compound to carry out structural optimization and subsequent fungicidal evaluation. Here 18 guanidine derivatives were designed and synthesized by a facile method, and their structures were characterized by 1H, 13C NMR, and HRMS. Biological assay indicated that most of the title compounds possess potential fungicidal activities against Alternaria altanata, and Penicillium digitatum. Especially, 5a, 5d, and 5i showed inhibition rates (IR) of 41.9, 41.9, and 44.2% respectively against P. digitatum at a concentration of 25 mg/L, whose activities surpassed that of hymexazol. This is the first report on the active derivatives from B. martensii in application of plant protection, providing scientific references for the development and utilization of active ingredients from scorpions.

Zhu, T., Li, K., Huang, D. et al. Structural Optimization, Fungicidal Activities Evaluation and Structure-activity Relationship of Guanidine Derivatives from Buthus martensii Karsch. Russ J Org Chem 59 (Suppl 1), S101–S110 (2023). https://doi.org/10.1134/S1070428023130109