Lorusso & Loud
Epoxysuccinic acid derivatives
 An epoxysuccinic acid derivative represented by the formula ##STR1## wherein R.sup.1 is a hydrogen atom or an alkyl group containing 1 to 4 carbon atoms, and a pharmaceutically acceptable salt are useful as cathepsin B inhibitors. 
Taisho Pharmaceutical Co., Ltd.
Y C A A
Y02P C07K A61K A61P
additional inventional additional inventional
Chihiro Mitsuo Kazunori
Yokoo Murata Hanada