175013-84-0 2H-Benzo(b)pyran-3-ol, 6-acetyl-4-(3-chloro-4-fluorobenzoylamino)-3,4-dihydro-2,2-dimethyl- 6-acetyl-4-(3-chloro-4-fluorobenzoylamino)-3,4-dihydro-2,2-dimethyl-2H-benzo(b)pyran-3-ol SB 220453 SB-220453 Tonabersat Tonabersat [BAN, INN]