(E)-8-(4-(4-Azidobutoxy)styryl)-1,3-diethyl-7-methylxanthine 155272-08-5 1H-Purine-2,6-dione, 3,7-dihydro-8-(2-(4-(4-azidobutoxy)phenyl)ethenyl)-1,3-diethyl-7-methyl-,(E)-