p. 5992 - 5994
(2011/10/18)(2009/01/20)
p. 95 - 98
(2007/10/03)2-amino-4,5-dimethylthiophene-3-carbonitrile
orthoformic acid triethyl ester
formamide
2-amino-4,5-dimethyl-3-thiophenecarboxylic acid ethyl ester
5,6-dimethylthieno<2,3-d>pyrimidin-4(3H)-one