| CAS登录号 | 中文名 | 英文名 | 分子结构式 | 分子式 | 详情 | 供应商 |
| 497-23-4 | 2(5H)-呋喃酮 | 2(5H)-Furanone; Furan-2(5H)-one; 2-Buten-1,4-olide |  | C4H4O2 | 详情 | 供应商 |
| 590-93-2 | 2-丁炔酸 | 2-Butynoic acid; Tetrolic acid |  | C4H4O2 | 详情 | 供应商 |
| 674-82-8 | 二乙烯酮; 双乙烯酮 | Acetyl ketene; 4-Methylene-2-oxetanone; Diketene; But-3-en-3-olide |  | C4H4O2 | 详情 | 供应商 |
| 922-67-8 | 丙炔酸甲酯 | Methyl propiolate; 2-Propynoic acid methyl ester; Methyl acetylenecarboxylate |  | C4H4O2 | 详情 | 供应商 |
| 28755-65-9 | Furanol; Furylalcohol |  | C4H4O2 | 详情 | 供应商 | |
| 33689-28-0 | 1,2-环丁二酮; 1,2-环丁二酮; | 1,2-Cyclobutanedione; 1,2-Cyclobutanedione |  | C4H4O2 | 详情 | 供应商 |
| 15506-53-3 | 1,3-Cyclobutanedione |  | C4H4O2 | 详情 | 供应商 | |
| 290-67-5 | 1,4-Dioxin; p-Dioxin(6CI,7CI,8CI); 1,4-Dioxacyclohexa-2,5-diene |  | C4H4O2 | 详情 | 供应商 | |
| 289-87-2 | 1,2-Dioxin; o-Dioxin(8CI); 1,2-Dioxacyclohexadiene |  | C4H4O2 | 详情 | 供应商 | |
| 2363-83-9 | ?丁烯二醛; ?丁烯二醛; | 2-Butenedial; 1,2-Ethenedicarboxaldehyde; 2-Butene-1,4-dione; Butenedial |  | C4H4O2 | 详情 | 供应商 |
| 22125-63-9 | 2-Furanol; 2-Furylalcohol; 2-Hydroxyfuran |  | C4H4O2 | 详情 | 供应商 | |
| 92279-91-9 | 2-Cyclopropen-1-one,2-(hydroxymethyl)-; Penitricin; Ro 09-0804 |  | C4H4O2 | 详情 | 供应商 | |
| 2345-51-9 | 3-Butynoic acid; 2-Ethynylaceticacid |  | C4H4O2 | 详情 | 供应商 | |
| 3511-31-7 | 3(2H)-Furanone; 2,3-Dihydro-3-furanone; 2H-Furan-3-one; Furenidone |  | C4H4O2 | 详情 | 供应商 | |
| 16979-06-9 | 3-Butenal, 2-oxo-; 2-Oxo-3-butenal; Vinylglyoxal |  | C4H4O2 | 详情 | 供应商 | |
| 3675-13-6 | 2-BUTENEDIAL, (Z)- |  | C4H4O2 | 详情 | 供应商 |
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