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1.Ethyl 2-amino-4-methyl-5-(methoxycarbonyl)thiophene-3-carboxylate
2.Ethyl 2-amino-4-biphenyl-4-yl-thiophene-3-carboxylate
3.Ethyl 2-amino-4-(4-bromo phenyl)-thiophene-3-carboxylateEthyl 2-amino-4-(4-bromo phenyl)-thiophene-3-carboxylate

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1.Ethyl 2-amino-4-methyl-5-(methoxycarbonyl)thiophene-3-carboxylate   126-127
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