2-(2-propynyloxy)-4-methylenetetrahydrofuran

3-甲基-2-呋喃甲酸甲酯

bromoacetaldehyde dipropargyl acetal

methyl 4-(5-methyl-3,6-dihydro-2H-1,2-oxazin-2-yl)benzoate

ethyl 2-ethoxycarbonylmethyl-4-methyl-furan-3-carboxylate