Quisqualamine
Mg2+ and DL-AP5 , NMDA receptor blockers , CNQX , an antagonist of both the AMPA and kainate receptors , and 2-hydroxysaclofen , a GABAB receptor antagonist , do not affect quisqualamine's actions "in vitro" , suggesting that it does not directly affect the ionotropic glutamate receptors or the GABAB receptor in any way . 
<triplet> NMDA receptor <subj> ionotropic glutamate receptor <obj> subclass of <triplet> AMPA <subj> ionotropic glutamate receptor <obj> subclass of <triplet> kainate receptor <subj> ionotropic glutamate receptor <obj> subclass of