Table 1. Orthogonal exchange kinetics ^a .

	Exchange	t 50 b (h)
		A	B	C
1	Boronate	<0.05	—	—
2	Hydrazone	—	11.9	—
3	Disulfide	—	—	2.5

^aSee Fig. 3 for structures, conditions and original data.

^bHalf-life of substrates to reach equilibrium under conditions A, B and C.