(CH2); 59.1 (CH3); 55.2 (CH3); 45.6 (CH); 41.7 (CH2); 19.9 (CH3)
ppm. IR (film) n: 3307, 2931, 1661, 1612, 1583, 1512, 1246, 1033
cm-1. MS (EI) m/z (%): 237 (M+, 1); 148 (69); 121 (45); 116 (32);
91 (13); 78 (18); 56 (59); 45 (100). HRMS Calcd for C13H20NO3
(M+): 238.1443; Found: 238.1435.
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