英文别名(1-Propanone, 1-(2,4-difluorophenyl)-2-[(tetrahydro-2H-pyran-2-yl)oxy]-,(2R)- ); (2R)-1-(2,4-DIFLUOROPHENYL)-2-((TETRAHYDRO-2H-PYRAN-2-YL)OXY) PROPAN-1-ONE; (2R)-1-(2,4-Difluorophenyl)-2-[(tetrahydro-2H-pyran-2-yl)oxy]-1-propanone; Efinaconazole Impurity 40; Efinaconazole Impurity I; (2R) -1- (2,4-difluorophenyl) -2- [(tetrahydro-2H-pyran-2-yl) oxy] -1-acetone 
