Hmm. Here's a guess as to pharmacology.

Serotonin 2a: inverse agonist
Serotonin 2c: weak partial agonist
Serotonin 2b: partial agonist
Serotonin transporter protein blocker (/reuptake inhibitor)

Muscarinic acetylcholine: inverse agonist
Enzymatic enhancer of acetylcholine esterase

Enzymatic enhancer of COMT (catechol-O-methyl transferase)

Enzymatic enhancer of POMC (pro-opio melanocortin) production

Enzymatic enhancer of L-glutamate decarboxylase
Enzymatic inhibitor of GABA transaminase

...it would need to be a big drug molecule probably.

Hmm... will need to look for some of that Zeta info.