(Z)-2-methoxy-3-methoxycarbonylmethylene-2,3,5,6-tetrahydro-4-pyranone

1,3-丙酮二羧酸二甲酯

2-(2-羟基乙基)-3-糠醛

3-hydroxymethyl-2-furylethanol

4-methoxy-6,7-dihydro-4H-furo(3,2-c)pyran