Novel esters of the formula ##STR1## wherein R is selected from the group consisting of ##STR2## W is selected from the group consisting of hydrogen and --CN, Z is selected from the group consisting of --CH.sub.2 -- and --O--, and is attached to a carbon atom included between a nitrogen and the sulfur atom of Y and Y is selected from the group consisting of thiazolyl or thiadiazolyl connected to ##STR3## at one of its available positions.
公式为##STR1##的新型
酯类,其中R从##STR2##组中选择,W从氢和--CN组中选择,Z从--CH.sub.2--和--O--组中选择,并附加到Y的氮和
硫原子之间包括的碳原子上,Y从连接到##STR3##的
噻唑基或
噻二唑基组中选择其可用位置之一。