HA-966 is an NMDA antagonist/low efficacy partial agonist at the glycine site, and has recently become available for purchase. It apparently has anxiolytic, hypnotic and analgesic properties.
By appearance it is a sort of cyclized gaba analog, quite reminiscent of GBL but has not been characterized to behave as such. Any idea as to how it functions as a hypnotic? One notion I came across regarding the source of its hypnotic effects relates to a possible disruption of striatal dopamine (in the manner of GBL).
What is unclear is the duration of effects and dosing but I might give it a try anyhow.