(Rac)-SHIN2 is a serine hydroxymethyltransferase ( SHMT ) inhibitor having 1,4-dihydropyranopyrazole structure. (Rac)-SHIN2 involves in folate or one-carbon metabolism pathways, prevents viral infection . SHMT1 and SHMT2 are the cytosolic and/or mitochondrial isoforms of serine hydroxymethyltransferase, respectively. (Rac)-SHIN2 is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.