Since 2009,new fungicides of succinate dehydrogenase inhibitor(SDHI)class have been continuously launched,leading to an increasing market share and making them among the top three fungicides in the market.There are 15 SDHI fungicides whose patents expire from 2022 to 2033,and 8 of them rank among the top ten in terms of sales for this category of products.This article provides a brief introduction including registration information,patent overview,market situation,and main synthesis methods of the 8 fungicides,in order to provide reference for further development of pesticides with expired patents.
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