2,3-Dihydro-7-chloro-4H-1-benzothiopyran-4-one oxime 1,1-dioxide 4H-1-Benzothiopyran-4-one, 2,3-dihydro-7-chloro-, oxime, 1,1-dioxide 67821-45-8 7-Chloro-4-hydroximino thiachroman-1,1-dioxide Dioxyde-1,1 de chloro-7-hydroximino-4 thia-chromanne [French]