77254-85-4 Magnesium, (3,7-dihydro-1,3-dimethyl-1H-purine-2,6-dione-N7,O6)(2-hydroxybenzoato(2-)-O1,O2)-, (T-4)- Theophylline magnesium salicylate Theophylline magnesium salicylate pentahydrate