claim: Henry Cavill starred in two Iron Man films.
evidence: The Isay reaction is an organic reaction in which certain diaminopyrimidines are transformed into pterins by condensation with a 1,2-dicarbonyl compound , such as 2,3-butanedione .. organic reaction. organic reaction. condensation. condensation. 2,3-butanedione. 2,3-butanedione. The reaction is named after Otto Isay .. Otto Isay. Otto Isay