1H-Purine-2,6-dione, 3,7-dihydro-1,3-dimethyl-8-[(4-methyl-1-piperidinyl)azo]- 73908-80-2 8-(4-Methyl-1-piperidinoazo)theophylline NSC62601 Theophylline, 8-(4-methylpiperidinoazo)-