In subsequent studies it was shown that the compound responsible for the biological activity was the carboxylic acid itself but that for optimum activity when used commercially it was important to choose a derivative which met requirements of product safety, ease of application and appropriate physical properties for translocation in the crop. After many derivatives of the acid had been tested, the S-methyl thioester was chosen for development under the code name CGA245704.
In subsequent studies, it was shown that the carboxylic acid itself was responsible for biological activity but for optimal effectiveness in commercial use, selecting a derivative meeting safety, application ease, and physical properties requirements for crop translocation was crucial. After testing many derivatives of the acid, the S-methyl thioester was chosen for development under the code name CGA245704.