.beta.-Hydroxypropyltheophylline 1,3-Dimethyl-7-(2-hydroxypropyl)xanthine 1H-Purine-2,6-dione, 3,7-dihydro-1,3-dimethyl-7-(2-hydroxypropyl)- 1H-Purine-2,6-dione, 3,7-dihydro-7-(2-hydroxypropyl)-1,3-dimethyl- 2-Hydroxypropyl-7-theophylline 3,7-Dihydro-7-(2-hydroxypropyl)-1,3-dimethyl-1H-purine-2,6-dione 603-00-9 7-(.beta.-Hydroxypropyl)-1,3-dimethylxanthine 7-(.beta.-Hydroxypropyl)theophylline 7-(2-Hydroxypropyl)theophylline Brontyl Hydroxypropyltheophylline MT Monophylline NSC163343 Oxypropyltheophylline Proxiphylline Proxy-Retardoral Proxyphylline Purophyllin Sanwaphyllin Sigophyl Spasmolysin Thean Theoden Theon Theophylline, 7-(2-hydroxypropyl)-