Roger Altounyan (19221987) tested hundreds of extracts of khellin on himself, taking it before and after exposing himself to a solution of guinea pig hair--to which he was allergic. Extract K84, which would later be shown to contain sodium cromoglycate, reduced his response to the allergen, and he wrote "Hurrah!" on his chart.
May 9, 1963 chart
Courtesy Mrs. Hella Altounyan
and Family, Cheshire, England