Tenofovir Carbonyl impurity

Chemical Name: 5-[[(1R)-1-methyl-2-[6-[(isopropoxycarbonyl)amino]-9H-purin-9-yl]ethoxy]methyl]-2,4,6,8-tetraoxa-5-phospanonanedioic acid bis(1-methylethyl)ester 5-oxide

Synonym: O,O-Bis(isoproproxycarbonyloxy methyl){®-[1-[(6-isopropxy-carbonylamino)-9H-purin-9-yl]propan-2-yloxy]}methyl phosphonate