| 序号 | 英文主题词 | 中文主题词 | 命中文献数量（篇） |
|---|
| 期刊 | 博硕士论文 | 会议论文 | 报纸 | 年鉴 | 成果 | 专利 | 国家标准 | 行业标准 | 标准 | 总计 |
| 2221 | 3-Hydroxybutyric Acid | 3-羟基丁酸 | 626 | 46 | 19 | 7 | 5 | 2 | 4 | 0 | 0 | 1 | 710 |
| 2222 | 3-Hydroxyanthranilic Acid | 3-羟基邻氨基苯甲酸 | 15 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 20 |
| 2223 | 3-Hydroxyacyl CoA Dehydrogenases | 3-羟酰CoA脱氢酶类 | 35 | 1 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 40 |
| 2224 | 3-Hydroxysteroid Dehydrogenases | 3-羟甾类脱氢酶类 | 126 | 6 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 134 |
| 2225 | 3-Mercaptopropionic Acid | 3-巯基丙酸 | 12 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 13 |
| 2226 | 3-Deazauridine | 3-脱氧尿苷 | 38 | 2 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 43 |
| 2227 | 3-Oxoacyl-(Acyl-Carrier-Protein) Synthase | 3-氧酰基-(酰载体蛋白)合酶 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2228 | 3-Isopropylmalate Dehydrogenase | 3-异丙基苹果酸脱氢酶 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2229 | Group III Histone Deacetylases | Ⅲ类组蛋白脱乙酰基酶 | 5 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 6 |
| 2230 | Group III Phospholipases A2 | Ⅲ族磷脂酶A2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2231 | 4-(3-Butoxy-4-methoxybenzyl)-2-imidazolidinone | 4-(3-丁氧基-4-甲氧基苄基)-2-咪唑啉酮 | 16 | 4 | 2 | 0 | 0 | 0 | 10 | 0 | 0 | 0 | 32 |
| 2232 | 4,4'-Diisothiocyanostilbene-2,2'-Disulfonic Acid | 4,4'-二异硫氰基苯-2,2'-二磺酸 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2233 | 4,5-Dihydro-1-(3-(trifluoromethyl)phenyl)-1H-pyrazol-3-amine | 4,5-二氢-1-(3-(三氟甲基)苯基)-1H-吡唑-3-胺 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
| 2234 | 4-1BB Ligand | 4-1BB配体 | 87 | 24 | 26 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 138 |
| 2235 | 4-Butyrolactone | 4-丁内酯 | 87 | 16 | 3 | 4 | 1 | 0 | 3 | 0 | 0 | 0 | 114 |
| 2236 | Heterocyclic Compounds with 4 or More Rings | ４环或４环以上杂环化合物 | 54706 | 1653 | 3402 | 2148 | 260 | 274 | 389 | 3 | 0 | 7 | 62901 |
| 2237 | Bis(4-Methyl-1-Homopiperazinylthiocarbonyl)disulfide | 4-甲基-1-高哌嗪硫代羰基二硫化物 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2238 | 4-Quinolones | 4-喹诺酮类 | 196 | 3 | 4 | 6 | 0 | 1 | 0 | 0 | 0 | 0 | 210 |
| 2239 | 4-Chloromercuribenzenesulfonate | 4-氯汞苯磺酸盐 | 115 | 8 | 3 | 0 | 0 | 0 | 0 | 1 | 0 | 2 | 129 |
| 2240 | 4-Hydroxyaminoquinoline-1-oxide | 4-羟氨基喹啉-1-氧化物 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |