1584
M. Wu et al.
7.2 Hz each, 2H), 2.28–2.01, 1.86–1.74 (2m, 2H), 1.24, 1.15 (2d, J = 6.2
Hz each, 3H), 1.21 (s, 18H). IR (neat, cm−1) 3020, 1754, 1632, 1216, and
764. HRMS Calcd for C23H38N5O9P (M+H)+ 560.2485. Found: 560.2469.
HPLC: tR = 22.01 min., 96.0%.
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