Ptomaines are chemical compounds of an alkaloidal nature formed in protein substances during putrefaction.
"The Dream Doctor"
Arthur B. Reeve
By extracting the dried Cypridinas ground to a powder, the solubility of luciferin in non-aqueous solvents could be easily studied, and by adding such reagents as dilute acids, alkalies, neutral salts and the alkaloidal reagents to an aqueous solution of luciferin the general biochemical behavior of luciferin can be quite accurately stated.
"The Nature of Animal Light"
E. Newton Harvey
The symptoms are described in detail, being in general, similar to those of alkaloidal poisoning.
"Some Constituents of the Poison Ivy Plant: (Rhus Toxicodendron)"
William Anderson Syme