钠 、 4-(p-Methylphenylthio)-5-nitro-3-sulfinobenzoic acid 、 2-(Thiophenoxy)-3-nitro-5-carboxybenzolsulfinsaeure 以5-amino-3-mercapto-4-(p-methylphenylthio)benzoic acid is obtained with a melting poinr of 178° - 182°C.的产率得到4-p-Methylthiophenoxy-5-amino-mercaptobenzoesaeure