4,4-Dimethoxybutan-2-one3-Oxobutyraldehyde dimethyl acetalAcetylacetaldehyde dimethyl acetal3-Ketobutyraldehyde dimethyl acetalACETYLACETALDEHYDE DIMETHYLACETAL4,4-二甲氧基-2-丁酮3-氧代丁醛二甲缩醛Acetylacetaldehyde dimethylacetal4,4-二甲氧基-2-丁酮3-Oxobutyraldehyde dimethylacetal4,4-Dimethoxy-2-butanone4,4-Dimethoxy-2-butanone3-丁酮乙酰乙醛二甲缩醛乙酰乙醛缩二甲醇3-Oxobutyraldehyde dimethylacetal3-氧代丁醛二甲缩醛Acetoacetaldehyde dimethyl acetal乙酰基乙醛缩二甲醇Acetylacetaldehyde dimethyl acetal