| 1 | 4971-56-6 | 4-羟乙酰乙酸内酯 | Tetronic acid | C4H4O3
| 酯;其它;有机砌块;通用试剂 | |
| 2 | | HYDROXYFURANONE | HYDROXYFURANONE | C4H4O3
| | |
| 3 | 18655-47-5 | 三甲酰基甲烷 | Triformylmethane | C4H4O3
| 脂肪族化合物 | |
| 4 | | oxolane-2,5-dione | oxolane-2,5-dione | C4H4O3
| | |
| 5 | 108-30-5 | 丁二酸酐 | Succinic anhydride | C4H4O3
| 原料;有机酸;羧酸酐;酸酐类;工业原料;有机化工;医药原料;通用试剂;有机砌块;其它试剂 | 医药 |
| 6 | 38628-65-8 | 2-羟基-3-丁炔酸 | Hydroxybutynoicacid | C4H4O3
| 炔烃 | |
| 7 | 56842-76-3 | 2-氧代-3-丁烯酸 | 2-Oxo-3-butenoic Acid | C4H4O3
| | |
| 8 | 22418-77-5 | 米诺膦酸杂质23 | 2-Butenoic acid, 4-oxo- | C4H4O3
| | |
| 9 | 541-57-1 | 季酮酸 | 4-hydroxyfuran-2(5H)-one | C4H4O3
| 酯;有机砌块;通用试剂 | |
| 10 | 7218-52-2 | 4-羟基丁-2-炔酸 | 4-Hydroxybut-2-ynoic acid | C4H4O3
| 有机酸;有机原料 | |
| 11 | 25409-36-3 | 2(5H)-Furanone, 3-hydroxy- | 2(5H)-Furanone, 3-hydroxy- | C4H4O3
| | |
| 12 | | SUCCINIC ANHYDRIDE, [1,4-14C] | SUCCINIC ANHYDRIDE, [1,4-14C] | C4H4O3
| | |
| 13 | | Succinic Anhydride-1,2,3,4-13C4 | Succinic Anhydride-1,2,3,4-13C4 | C4H4O3
| | |
| 14 | 754147-29-0 | 3,6-Dioxabicyclo[3.1.0]hexan-2-one | 3,6-Dioxabicyclo[3.1.0]hexan-2-one | C4H4O3
| | |
| 15 | 89238-09-5 | | 2-Propenoic acid, 3-oxo-, methyl ester | C4H4O3
| | |
| 16 | 68412-02-2 | 2,5-Furandione, dihydro-, mono-C11-13-alkenyl derivs. | 2,5-Furandione, dihydro-, mono-C11-13-alkenyl derivs. | C4H4O3
| | |