the conformationally mobile isomer of thaz and iso-thaz , 3-pyol ( 5- ( 3-pyrrolidinyl ) -3-isoxazolol ) , was a much less selective glycine antagonist , being also an antagonist of gaba , 3,4-taza ( 2,5,6,7-tetrahydro-1h-azepine-4-carboxylic acid ) and 4,5-taza ( 2,3,6,7-tetrahydro-1h-azepine-4-carboxylic acid ) , which are amino acid analogues of thia and thaz , respectively , and ring homologues of isoguvacine , were also shown to be glycine antagonists .
C0017890
glycine
C0002520
amino acid