Thus, 3 mol of Ethyl acetoacetate were treated with 2 mol of formaldehyde to yield 80% of I. Addn. of I at 0.01 g to a vanilla flavor compn. enhanced the flavour by making it more natural and imparting a coumarin-like, coconut-like aroma.

• 如：用2摩尔的甲醛处理3摩尔的乙酰乙酸乙酯可得到80%25的I。将0.；01g的I添加到香草风味的芳香化合物中；可使其香味更加自然并具有香豆素及椰子的香味。