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Table 4 Occurrence of any individual alkaloid among the ten M. rubriventris skins examineda

From: Alkaloids from single skins of the Argentinian toad Melanophryniscus rubriventris (ANURA, BUFONIDAE): An unexpected variability in alkaloid profiles and a profusion of new structures

Frequency of occurrence Total such alkaloids New alkaloids among them
Once 30 24
Twice 24 14
Three times 9 3
Four times 17 8
Five times 5 1
Six times 5 0
Seven times 6 4
Eight times 3 2
Nine times 0 0
Ten times 3 0
  1. a Includes diastereomers counted together with the major alkaloid.