Table 3.

Determination of relative prodrug efficiencies.^[a]

Compound	k1	α	R2
2[11]	−5.2	4.7	0.97
3[11]	0.96	0.84	1.0
4[11]	−1.3	1.8	0.97
5[11]	−1.7	2.4	0.98
12[11]	−2.6	2.6	0.90
14	−1.8	2.2	1.0
17	2.2	2.2	0.97

^[a]Data represent the values determined from the mean of three independent experiments.