英文别名Tolterodine impurity 13; Tolterodine Lactol Impurity; 6-methyl-4-phenyl-3,4-dihydro-2H-chromen-2-ol; 2H-1-Benzopyran-2-ol, 3,4-dihydro-6-methyl-4-phenyl-; 6-Methyl-4-phenylchroman-2-ol; 6-methyl-4-phenyl-chroman-2-ol; racemilactol; 2-hydroxy-6-methyl-4-phenyldihydrobenzopyran; 3,4-dihydro-6-methyl-4-phenyl-2H-benzopyran-2-ol; Tolterodine Lactol Impurity (USP) 
