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Specimen 1 H NMR spectra of 2-chloromethylthienopyrimidines:Part-IResults and Discussion2. 1 H NMR spectrum of 2-chloromethyl-5,6,7,8-tetrahydrobenzo(b)thieno[2,3-d]pyrimidin-4(3H)-one IIiONHSNC 11 H 11 ClN 2 OSMol. Wt.: 254.74Cl1 H NMR (CDCl 3 )δppm: 1.62 (4H, s, CH 2 at 6 & 7), 2.77 (2H, s, CH 2 at 4), 3.02 (2H, s,CH 2 at 8), 4.55 (2H, s, CH 2 at 2), 10.60 (1H, s, NH at 3).Specimen Mass spectra of 2-chloromethylthienopyrimidines:3. Mass spectra of 2-chloro-methyl-5,6,7,8-tetrahydrobenzo(b)thieno[2,3-d]pyrimidin-4(3H)-one.ONHSNC 11 H 11 ClN 2 OSMol. Wt.: 254.74ClMS m/e: 255(M + ), 219, 149.103