| abstract |
The present invention relates to compounds of formula (I) wherein R is a -C (O) (CH2) nC (O) OH; b) a group of formula (b) wherein R 1 is -N (R 2) (R 3) and R 2 / R 3 are independently hydrogen or lower alkyl, or optionally lower alkyl substituted cyclic tertiary amine; c) -P (O) (OH) 2; or d) a group -C (O) (CH2) nNHC (O) (CH2) nN (R2) (R3); and n is 1, 2, 3 or 4] and a pharmaceutically acceptable acid addition salt thereof. The compounds of the present invention can be used as prodrugs of a compound of formula (II) for use in the treatment of NMDA receptor-related diseases. HE |