1-[(2R,3R,4R,5R)-4-hydroxy-5-(hydroxymethyl)-3-methoxy-oxolan-2-yl]pyrimidine-2,4-dione, 2'-O-Methyluridine, 2''-O-METHYLURIDINE CRYSTALLINE; 2'-O-methyl-uridine; 1-[(2R,3R,4R,5R)-4-hydroxy-3-methoxy-5-methylol-tetrahydrofuran-2-yl]pyrimidine-2,4-quinone; 1-[(2S,3S,4R,5S)-4-hydroxy-5-(hydroxyMethyl)-3-Methoxyoxolan-2-yl]-1,2,3,4-tetrahydropyriMidine-2,4-dione; 1-((2R,3R,4R,5R)-4-Hydroxy-5-(hydroxyMethyl)-3-Methoxytetrahydrofuran-2-yl)pyriMidine-2,4(1H,3H)-dione; 2’-OMeUridine; 2-O-Methyluridine; 2'-O-GALLOYLHYPERIN,CERTIFIED REFERENCE MATERIAL; 2'-OMe uridine; 2'-O-METHYLURIDINE (CHIRAL);