(2R,4S) -H-D-Pro (4-N3) -OH (hydrochloride)

(2R,4S) -H-D-Pro (4-N3) -OH hydrochloride is a click chemistry reagent containing an azide group. It contains an azide group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing alkyne groups. It can also undergo ring strain-promoted alkyne-azide cycloaddition (SPAAC) with molecules containing DBCO or BCN groups.