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Specimen 1 H NMR spectra of some 2-chloromethylthienopyrimidinesPart-IIResults and Discussion3. 1 H NMR spectrum of 2-(chloromethyl)-5-(4-methylphenyl)thieno[2,3-d]-pyrimidin-4(3H)-one (Vi)ONHClSNC 14H 11ClN 2OSMol. Wt.: 290.771 H NMR (CDCl 3 )δppm: 2.39 (3H, s, CH 3 ), 4.53 (2H, s, CH 2 ), 7.13 (1H, s, CH), 7.19-7.46(4H, m, Ar-H), 10.43 (1H,s, NH).Specimen Mass spectra of some 2-chloromethylthienopyrimidines4. Mass spectrum of 6-chloromethyl-2,4-dimethyl-7H-9-thia-1,5,7-triaza-fluoren-8-one(Vxvi)ClNNHNSC 12 H 10 ClN 3 OSMol. Wt.: 279.75OMS m/e: 281(M+1), 279(M + ), 244, 216.342