Decay of a substrate (aqueous solutions of BrdU, SeCNdU, OTfdU, OTfDMU buffered with 10 mM phosphate buffer, pH = 7.0) induced by radiolysis (140 Gy). Experiment was performed in triplicate. Results are shown as mean ± SD.

Analog	Decay [%]
BrdU	17.14 ± 0.27
SeCNdU	30.42 ± 0.72
OTfdU	16.25 ± 0.95
OTfDMU	26.60 ± 0.12