string: …a selective M2/M4 autoreceptor antagonist, that blocks the self-inhibitory mechanism by which acetylcholine
  regulates its own release and (iii) by selectively blocking M1 muscarinic receptors, key modulators of both LTD and LTP
  (Calabresi et al., 2000; Wang et al., 2006; Bonsi et al., 2008).