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. Hz, 72 (s, 2H, CH 2 C=O)

. Hz, 72 (s, 2H, CH 2 C=O)

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M. Ci, NH 3 ) m/z, p.308

M. Ci, NH 3 ) m/z, p.250

M. Ci, NH 3 ) m/z, p.307

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. Hz, 52 (s, 3H, NCH 3, p.41

M. Ci, NH 3 ) m/z, p.265