1-Butyl-3-benzyl-5,6-dimethylthieno(2,3-d)pyrimidin-2,4(1H,3H)-dione 1-Butyl-5,6-dimethyl-3-(phenylmethyl)thieno(2,3-d)pyrimidine-2,4(1H,3H)-dione 203808-40-6 Thieno(2,3-d)pyrimidine-2,4(1H,3H)-dione, 1-butyl-5,6-dimethyl-3-(phenylmethyl)-