1-(3-(Dimethylamino)propyl)-1-(4-fluorophenyl)-1,3-dihydroisobenzofuran-5-carbonitrile monohydrobromide 59729-32-7 Celexa Citalopram hydrobromide [USAN] EINECS 261-890-6 HSDB 7042 Lu 10-171-B citalopram hydrobromide