19295-31-9 2-Amino-7-(1,2-dihydroxyethyl)-6-(methylthio)thieno(3,2-g)pteridin-4(3H)one Thieno(3,2-g)pteridin-4(1H)-one, 2-amino-7-(1,2-dihydroxyethyl)-6-(methylthio)-, (-)- Urothion Urothione