Doxofylline Impurity 6 Catalogue D349276 CAS 1174289-18-9 M.W 266.26 M.F C11H14N4O4 Specifications FAQs 9-((1,3-dioxolan-2-yl)methyl)-1,3-dimethyl-3,9-dihydro-1H-purine-2,6-dione
