Darunavir Difurofuranyl Impurity

Chemical Name: (3R,3aS,6aR)-hexahydrofuro[2,3-b]furan-3-yl (4-(N-((2R,3S)-3-(((((3R,3aS,6aR)-hexahydrofuro[2,3-b]furan-3-yl)oxy)carbonyl)amino)-2-hydroxy-4-phenylbutyl)sulfamoyl)phenyl)(isobutyl)carbamate