| CAS编号 | 中文名 | 英文名 | 分子式 | 分子量 | 熔点 | 沸点 |
| 4254-67-5 | 2-溴-4'-苄氧基苯乙酮 | 1-(4-(benzyloxy)phenyl)-2-bromoethanone | | | | |
| 4254-85-7 | 1,5-二羟基-3-戊酮 | 1,5-dihydroxypentan-3-one | | | | |
| 4254-88-0 | | l-a-aminosuberic acid | C8H15NO4 | 189.21 | | |
| 42540-40-9 | 头孢孟多 | 5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid, 7-(((formyloxy)phenylace | C19H17N6NaO6S2 | 512.49 | | |
| 42540-56-7 | | 1'-acetyl-spiro(cyclopentane-3'-indoline) | | | | |
| 425412-27-7 | 5-(2-氯苯基)-3-(3-硝基苯基)-1,2,4-噁二唑 | 5-(2-chlorophenyl)-3-(3-nitrophenyl)-1,2,4-oxadiazole | | | | |
| 425415-37-8 | n-(2-溴苯)-2-(三氟甲基)苯甲酰胺 | n-(2-bromophenyl)-2-(trifluoromethyl)benzamide | | | | |
| 42542-07-4 | | alpha-ethyl-3,4-methylenedioxy-phenethylamin hydrochloride | | | | |
| 42542-10-9 | | n,alpha-dimethyl-3-benzodioxole-5-ethanamine | | | | |
| 425425-25-8 | 2-氯-4-甲基-6-(吡咯烷-1-基)嘧啶 | 2-chloro-4-methyl-6-(pyrrolidin-1-yl)pyrimidine | | | | |
| 425426-80-8 | | 3-methoxy-5-(trifluoromethyl)thiophene-2-carboxylic acid | | | | |
| 425432-04-8 | | poly(3,4-ethylenedioxythiophene)-n-2'-ethylhexyl-4,5-dicarboxylic imidide-benzo[c]thiophene) | | | | |
| 42544-24-1 | | 1,1-dipropyl-3-(3-trifluoromethyl-phenyl)-urea | | | | |
| 42545-22-2 | 1-甲基-1h-咪唑-4,5-二羧酸二甲酯 | dimethyl 1-methyl-1h-imidazole-4,5-dicarboxylate | | | | |
| 42545-43-7 | | 2-(4-methoxyphenyl)thiophene | C11H10OS | | | |
| 42548-08-3 | | n-cbz-3-(cbz-amino)-dl-alanine | | | | |
| 42548-78-7 | n-乙基羟胺盐酸盐 | n-ethylhydroxylamine hydrochloride | | | | |
| 42549-09-7 | | 4-Diethylaminophenyl isocyanide | 51-55 ℃(lit.) | 174.24 | 51-55 ℃(lit.) | |
| 42549-86-0 | | 2,2-dimethyl-7-octenoic acid | | | | |
| 4255-07-6 | 草酸锌,二水 | Zinc oxalate,dihydrate | C2O4Zn·2H2O | | | |
| 4255-22-5 | | ethylene glycol 1,2-bis-(dihydrodicyclopentadienyl ether) | | | | |
| 4255-23-6 | | alfetamine | | | | |
| 4255-24-7 | | alpha-allyl-phenethylamin hydrochloride | | | | |
| 4255-62-3 | | 4,4-Dimethyl-cyclohexanone | C8H14O | 126.20 | | |
| 4255-80-5 | | 6α-Methyl-9α,10β-pregn-4-ene-3,20-dione | C22H32O2 | 328.49 | | |
| 4255-94-1 | | 2,5-diethoxy-4-(4-morpholinyl)-benzenediazoniu hexafluorophosphate(1-) | | | | |
| 42551-55-3 | | 3-amino-butan-2-ol | C4H11NO | 89.14 | | |
| 42553-22-0 | | 1,4-benzenedicarboxylic acid, polymer with hexahydro-2h-azepin-2-one and 4,4'-m | | | | |
| 42553-65-1 | α-藏花素 | 8,8'-diapo-psi,psi-carotenedioic acid, bis(6-o-beta-d-glucopyranosyl-beta-d- gl | C44H64O24 | 976.50 | | |
| 42556-67-2 | 反丁烯二酸与丙二醇和3-氧杂-1,5-戊二醇的聚合物 | Fumaric acid, polymer with propyleneglycol, and 3-oxa-1,5-pentanediol | (C4H4O4·C3H8O2·C4H10O3)x | | | |
| 42556-95-6 | | oxirane, polymer with thiirane | | | | |
| 42557-10-8 | | baysilone oil m30000 | | | | |
| 42558-01-0 | | 2-(1-hydroxypentyl)-cyclopentanon | | | | |
| 42558-50-9 | | (S)-(+)-methyl 3-hydroxypentanoate | C6H12O3 | 132.15 | | |
| 42558-54-3 | | methyl 4-methyl-3-0xopentanoate | | | | |
| 42558-60-1 | | 4-(guanidinomethyl)-1(2h)-phthalazinon hemisulfate | | | | |
| 42558-61-2 | | 4-(guanidinomethyl)-2-methyl-1(2h)-phthalazinon hemisulfate | | | | |
| 42558-62-3 | | 1(2h)-phthalazinone, 2-ethyl-4-(guanidinomethyl)-, hemisulfate, sesquihydrate | | | | |
| 42558-63-4 | | 4-(guanidinomethyl)-2-(2-(2-pyridyl)ethyl)-1(2h)-phthalazinon hemisulfate | | | | |
| 42558-93-0 | | cis-4-(3-(2-chloroethyl)-3-nitrosoureido)cyclohexanecarboxylic acid | | | | |
| 42558-94-1 | | (e)-cyclohexanecarboxylic aci | | | | |
| 42559-25-1 | | 1,1',2,2',6,6'-hexamethyl-4,4'-bipyridinium bis[tetrafluoroborate] | C16H22B2F8N2 | 415.97 | | |
| 42559-29-5 | | 4,4'-bis(2,6-diphenylpyrylium tetrafluoroborate) | | | | |
| 42559-33-1 | | 4,4'-bis(2,6-diphenylthiopyrylium tetrafluoroborate) | | | | |
| 4256-26-2 | | 1-cyclohexyl-5-octyl-barbituric aci | | | | |
| 4256-27-3 | | 5-allyl-1-(4-hydroxycyclohexyl)-barbituric aci | | | | |
| 4256-35-3 | | 1,2,3,4-tetrahydro-1,2-diphenyl-6-methoxy-1-naphtho | | | | |
| 4256-36-4 | | 1,2,3,4-tetrahydro-6-methoxy-2-phenyl-1-(p-tolyl)-1-naphtho | | | | |
| 4256-37-5 | | 1,2-dihydro-3,4-diphenyl-7-methoxy-naphthalen | | | | |
| 4256-38-6 | | 1,2-dihydro-7-methoxy-3-phenyl-4-(p-tolyl)-naphthalen | | | | |
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