Recently, we developed 2-(4- [4-nitrobenzyloxy] benzyl) thiazolidine-4-carboxylic acid ethyl ester (SN-6), a newly synthesized and selective inhibitor of Na(+)/Ca(2+) exchanger. SN-6 is a selective inhibitor for the Ca(2+) influx mode of Na(+)/Ca(2+) exchanger. And this compound attenuated