Strychnos toxifera

Strychnos toxifera, called bush rope and devil doer, is a species of flowering plant in the genus Strychnos, native to Costa Rica, Panama, Colombia, Ecuador, Venezuela, the Guianas, Brazil, Peru and Bolivia.^[2] It is the principal source of calabash or gourd curare.^[3]

Strychnos toxifera
Botanical illustration
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Gentianales
Family:	Loganiaceae
Genus:	Strychnos
Species:	S. toxifera
Binomial name
Strychnos toxifera R.H.Schomb. ex Lindl.[1]
Synonyms[2]
Strychnos syntoxica Sprague & Sandwith

Macusine B is an alkaloid inhibitor of adrenergic alpha-receptors and tryptamine receptors that can be isolated from Strychnos toxifera.^[4]