40691-50-7 7-(Methylsulfinyl)-9-oxoxanthene-2-carboxylic acid 7-Methylsulfinyl-9-oxo-2-xanthencarbonsaeure 9H-Xanthene-2-carboxylic acid, 7-(methylsulfinyl)-9-oxo- RS 7337 TIXANOX Tixanox [USAN:INN] Tixanoxum [INN-Latin]