abstract |
The present patent application discloses compounds having the formula ##STR1## or a pharmaceutically acceptable salt thereof wherein R 21 and R 22 each independently are alkyl; and n R 1 , R 2 , R 3 , R 4 , R 11 , R 12 , R 13 , and R 14 each independently are hydrogen, halogen, CF 3 , CN, or NO 2 . n The compounds are useful as in vivo active glutamate antagonists. |