| abstract |
Disclosed is the compound (1R,4S,5S,6S)-4-(2'S-4'-methylthio-2'-aminobutanonyl)amino-2,2-dioxo-2lambda6-thia-bicyclo[3.1.0]hexane-5,6-dicarboxylic acid or a pharmaceutically acceptable salt thereof. Compounds of the type disclosed are prodrugs of compounds of formula (II) wherein X is SO2, R10 is H and R11 is H. The compounds of the invention are useful in the treatment of neurological and psychiatric disorders |