ChEBI: Strychnine is a monoterpenoid indole alkaloid that is strychnidine bearing a keto substituent at the 10-position. It has a role as an avicide, a glycine receptor antagonist, a cholinergic antagonist, a rodenticide and a neurotransmitter agent. It is a monoterpenoid indole alkaloid and an organic heteroheptacyclic compound. It is a conjugate base of a strychnine(1+). It derives from a hydride of a strychnidine.