100422-75-1
ethyl 2-(benzothiazol-2-yl)-5-oxo-2,5-dihydroisoxazole-4-carboxylate
→
~78%
126573-83-9
ethyl 2-hydroxy-4-oxo-4H-benzo[4,5]thiazolo[3,2-a]pyrimidine-3-carboxylate