Synonyms: 1H-Purine-2,6-dione,7-[2-[[2-(3,4-dihydroxyphenyl)-2-hydroxyethyl]amino]ethyl]-3,7-dihydro-1,3-dimethyl-,monohydrochloride (9CI); Theophylline, 7-[2-[(b,3,4-trihydroxyphenethyl)amino]ethyl]-, hydrochloride(7CI); Theophylline, 7-[2-[(b,3,4-trihydroxyphenethyl)amino]ethyl]-, monohydrochloride (8CI); NSC293888