1H-Purine-2,6-dione,3,7-dihydro-1,3,7-trimethyl-,monohydrobromide (9CI), Caffeine hydrobromide, Caffeine bromide, Caffeine,monohydrobromide (8CI), 1H-Purine-2,6-dione, 3,7-dihydro-1,3,7-trimethyl-, monohydrobromide, 1H-Purine-2,6-dione,3,7-dihydro-1,3,7-trimethyl-,hydrobromide (1:1)