6-甲氧基-2,6-二氢-3H-吡喃-3-酮

4-Bromo-6-methoxy-2H-pyran-3(6H)-one

曲酸

5-（苄氧基-2-（羟甲基)-4H-吡喃-4-酮

1,3,4-tri-O-acetyl-β-D-xylopyranose