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18. Spectroscopic data for 9a: 1H NMR (CDCl3, 270 MHz) l
3.89 (2H, s, C6H5CH2N), 4.08 (4H, s, CH2NCH2), 7.33
(5H, broad s, C6H5); 13C NMR (CDCl3, 68 MHz) l 63.45
(C6H5C6 H2N), 75.06 (CH2NCH2), 127.51 (ꢀCpara), 128.37
and 128.57 (ꢀCortho and ꢀCmeta), 138.04 (Cquat.), 201.24
(CꢀO); IR (NaCl, cm−1): 1810 (wCꢀO); MS (70 eV) m/z
(%): 161 (M+, 2), 160(2), 134(7), 133(40), 132(12), 106(2),
105(4), 104(4), 103(4), 91(59), 89(5), 84(4), 77(4), 65(16),
63(5), 51(7), 44(5), 43(4), 42(100), 41(9).
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