1-Phthalazineacetic acid, 2-(1,2,3-benzothiadiazol-5-yl)-7-chloro-1,2,3,4-tetrahydro-4-oxo- 2-(1,2,3-Benzothiadiazol-5-yl)-7-chloro-4-hydroxy-1,2-dihydrophthalazin-1-ylacetic acid 57410-31-8 Bts 39542