A transponder is disclosed to receive a wireless electromagnetic query signal and transmit a corresponding wireless electromagnetic response signal. The inhibitors of MIF have the following structures:including stereoisomers, prodrugs and pharmaceutically acceptable salts thereof, wherein n, R1, R2, R3, R4, X, Y and Z are as defined herein. The source data object container comprises a source change history, and the destination data object container comprises a destination change history.