Lamotrigine N2 Oxide Impurity Catalogue No. - VL980014 CAS No. - 136565-76-9 Molecular Formula - C9H7Cl2N5O Molecular Weight - 272.09 g/mol IUPAC Name - 6-(2,3-Dichlorophenyl)-1,2,4-triazine-3,5-diamine 2-Oxide