Loganin is one of the best-known of the iridoid glycosides.It is named for the Loganiaceae,having first been isolated from the seeds of a member of that plant family,namely those of Strychnos nux-vomica the strychnine tree.It also occurs in Alstonia boonei (Apocynaceae), a medicinal tree of West Africa and in the medicinal/entheogenic shrub Desfon...