有機試薬

1世紀初期から19世紀中葉まで,主に天然有機物(例えば動物、植物の抽出液)を利用して定性分析や定量分析を行う。19世紀下半葉から20世紀20年代まで,人工的に合成される有機試薬が始めて現れ,例えばオキソジチオ炭酸カリウムでニッケル、銅、モリブデンを検出する;モリンでアルミを検出する;ジアゾカップリング反応で亜硝酸イオンを検出する;α-ニトロソ基-β-ナフトールでコバルトを検出する;ジアセチルジオキシムでニッケルを検出する等。30年代エフェクト基群を提供しかつ50年代末分析官能基群理論を提出した後に,異なるイオンのエフェクト分析官能基群を探すために,大量の有機試薬の選別作業を行い,多くの実用的価値のある試薬(例えば銅試薬、ネオクプロイン試薬、カドミウム試薬、ベリリウム試薬、トロン試薬等)を合成した。50年代前,錯体は分析化学において主に二成分キレート化合物の沈殿反応によって定性的検出、沈殿分離及び重量分析等に用いられ,50~60年代初期錯滴定法を主とし,60年代後期から,研究の重点は光分析に変化し,それと同時にキレート化合物の有機溶剤の抽出を発展させる。8-ヒドロキシキノリン、ヒドラゾン系、オキシム系、ヒドロキサム酸系、ポリフェノール系、1,10-フェナントロリン系、リン酸系抽出剤、β-ジケトン系、トリフェニルメタン系酸性染料、キサンテン系染料及びアゾ系染料等の様々な試薬は広く研究しかつ応用される。その一方,有機試薬の構造に関する論理研究(例えば電子的効果、立体効果、置換基の影響)は新規な有機試薬の開発を推し進め,例えばヘテロ環アゾ系試薬。この間にモノアゾクロモトロプ酸系試薬及びビスアゾクロモトロプ酸系試薬の発展も進んでいる。70年代中期,吸着剤とキレート樹脂は大幅に発展してきた。80年代以来,中国の分析化学研究者はさらに非対称型ビスアゾクロモトロプ酸系試薬の合成と応用分野で良い結果を取得する。 有機試薬は分析化学分野における応用が非常に広く,主に溶剤、沈殿剤、錯化剤、指示薬、発色剤及び界面活性剤等に用いられる。様々な分析要件を満たすために,ある時にある試薬を精製する必要があり,一般的に蒸留法を利用して液体状の有機試薬を精製し,それに対して結晶法や昇華法を利用して固体物質を精製する。蒸気圧の高い物質即ち精製の沸点が低く又は沸騰温度でも分解しない有機試薬に対して一般的に常圧蒸留法を利用して精製を行う;発揮しにくく又は水にわずかに溶解する物質即ち精製の沸点が高く又は沸騰温度で分解する有機試薬に対して減圧蒸留法や水蒸気蒸留法を利用して精製を行う。 蒸留法によって有機試薬を精製することは実験室でよく使用される精製方法である。常用の蒸留装置は一般的に蒸留器、凝縮器と収集器という三つの部分によって構成され,またその補助装置は加熱器、温度計、液体収集管、コーク等を含む。
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Structure Chemical Name CAS MF
6-(モルホリノ)ピリジン-3-ボロン酸 6-(モルホリノ)ピリジン-3-ボロン酸 904326-93-8 C9H13BN2O3
1-butoxyethyl methacrylate 1-butoxyethyl methacrylate 85997-75-7 C10H18O3
2-(4-cyclopropyl-3-(1,4-dioxan-2-yl)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane 2-(4-cyclopropyl-3-(1,4-dioxan-2-yl)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane 2222996-75-8 C19H27BO4
2,3‐ジフルオロ‐4‐ホルミルフェニルボロン酸 2,3‐ジフルオロ‐4‐ホルミルフェニルボロン酸 480424-84-8 C7H5BF2O3
(3,3-Dimethyloxiranyl)methanol (3,3-Dimethyloxiranyl)methanol 18511-56-3 C5H10O2
2-(3-Tetrahydrofuranyl)phenylboronic acid pinacol ester 2-(3-Tetrahydrofuranyl)phenylboronic acid pinacol ester 2223009-07-0 C16H23BO3
2-(2-chloro-4-(tetrahydro-2H-pyran-4-yl)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane 2-(2-chloro-4-(tetrahydro-2H-pyran-4-yl)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane 2223040-21-7 C17H24BClO3
(4-{[(TERT-ブチルトキシカルボニル)(メチル)アミノ]メチル}フェニル)ボロン酸 (4-{[(TERT-ブチルトキシカルボニル)(メチル)アミノ]メチル}フェニル)ボロン酸 1287753-35-8 C13H20BNO4
2-(3-(2,2-difluoro-1-methylcyclopropyl)-5-methoxyphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane 2-(3-(2,2-difluoro-1-methylcyclopropyl)-5-methoxyphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane 2710293-50-6 C17H23BF2O3
Pyridine, 2-chloro-4-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazol-1-yl]- Pyridine, 2-chloro-4-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazol-1-yl]- 1402174-47-3 C14H17BClN3O2
ETHYLENE GLYCOL ETHYLENE GLYCOL
4-クロロ-3-ヒドロキシフェニルボロン酸 4-クロロ-3-ヒドロキシフェニルボロン酸 915201-06-8 C6H6BClO3
(4-(morpholin-2-yl)phenyl)boronic acid (4-(morpholin-2-yl)phenyl)boronic acid 2225152-67-8 C10H14BNO3
3-(pyridin-4-yl)phenylboronic acid 3-(pyridin-4-yl)phenylboronic acid 337536-25-1 C11H10BNO2
トリフルオロ(ネオペンチル)ほう酸カリウム トリフルオロ(ネオペンチル)ほう酸カリウム 1150655-02-9 C5H11BF3K
1,4-Dimethyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-1,2,3-triazole 1,4-Dimethyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-1,2,3-triazole 1627933-42-9 C10H18BN3O2
3-chloropropane-1-sulfonic Acid 3-chloropropane-1-sulfonic Acid 56984-95-3 C3H7ClO3S
ファフィアオール ファフィアオール C25H44O3
5-(dimethylamino)pyridin-3-ylboronic acid 5-(dimethylamino)pyridin-3-ylboronic acid 1018680-09-5 C7H11BN2O2
4-(4-Chlorophenyl)thiazole-5-boronic acid pinacol ester 4-(4-Chlorophenyl)thiazole-5-boronic acid pinacol ester 2223053-49-2 C15H17BClNO2S
2-(2-cyclopropyl-5-(methoxymethyl)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane 2-(2-cyclopropyl-5-(methoxymethyl)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane 2223039-31-2 C17H25BO3
アデノシン 3′-リン酸 5′-ホスホ硫酸 リチウム塩 水和物 アデノシン 3′-リン酸 5′-ホスホ硫酸 リチウム塩 水和物 109434-21-1 C10H16LiN5O13P2S
2-(フェナントレン-9-イル)-5,5-ジメチル-1,3,2-ジオキサボリナン 2-(フェナントレン-9-イル)-5,5-ジメチル-1,3,2-ジオキサボリナン 1416371-19-1 C19H19BO2
tert-butyl 3-(5-amino-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)azetidine-1-carboxylate tert-butyl 3-(5-amino-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)azetidine-1-carboxylate 2223044-43-5 C20H31BN2O4
6-Fluoro-5-bromopyridine-3-boronic acid 6-Fluoro-5-bromopyridine-3-boronic acid 2225178-36-7 C5H4BBrFNO2
2-[3-Fluoro-5-(3-oxetanyl)phenyl]-4,4,5,5-tetramethyl-1,3,2-dioxaborolane 2-[3-Fluoro-5-(3-oxetanyl)phenyl]-4,4,5,5-tetramethyl-1,3,2-dioxaborolane 2223011-81-0 C15H20BFO3
Sulfo-Cy5-Methyltetrazine Sulfo-Cy5-Methyltetrazine 1801924-46-8 C44H51N7O10S3
methyl 4-cyano-2-cyclopropyl-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzoate methyl 4-cyano-2-cyclopropyl-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzoate 2819708-44-4 C18H22BNO4
(4-chloro-6-methylpyrimidin-5-yl)boronic acid (4-chloro-6-methylpyrimidin-5-yl)boronic acid 2710289-94-2 C5H6BClN2O2
(3-cyano-5-(methoxy-d3)phenyl)boronic acid (3-cyano-5-(methoxy-d3)phenyl)boronic acid 2241871-85-0 C8H8BNO3
2-Chloro-4-(4-methyl-1H-pyrazol-1-yl)phenylboronic acid 2-Chloro-4-(4-methyl-1H-pyrazol-1-yl)phenylboronic acid 2225179-50-8 C10H10BClN2O2
Azido-PEG3-CH2CO2-NHS Azido-PEG3-CH2CO2-NHS 1092654-47-1 C12H18N4O7
3-(Piperidin-4-yl)-4-methylphenylboronic acid 3-(Piperidin-4-yl)-4-methylphenylboronic acid 2225173-10-2 C12H18BNO2
(S,R.S)-AHPC-PEG4-acid (S,R.S)-AHPC-PEG4-acid 2172820-12-9 C34H50N4O10S
2-(oxetan-3-yl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)aniline 2-(oxetan-3-yl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)aniline 2223037-06-5 C15H22BNO3
2-AMINO-5-FLUOROPHENYL BORONIC ACID PINACOL ESTER 2-AMINO-5-FLUOROPHENYL BORONIC ACID PINACOL ESTER 863578-24-9 C12H17BFNO2
(2-(1H-imidazol-2-yl)pyrimidin-5-yl)boronic acid (2-(1H-imidazol-2-yl)pyrimidin-5-yl)boronic acid 2256747-81-4
3-(Thiazol-5-yl)-5-trifluoromethylphenylboronic acid pinacol ester 3-(Thiazol-5-yl)-5-trifluoromethylphenylboronic acid pinacol ester 2223040-69-3 C16H17BF3NO2S
8-オキサ-1-アザスピロ[4.5]デカン 8-オキサ-1-アザスピロ[4.5]デカン 51130-63-3 C8H15NO
1-(3-Fluorophenyl)-3-(4,4,5,5-tetraMethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole 1-(3-Fluorophenyl)-3-(4,4,5,5-tetraMethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole 1402240-90-7 C15H18BFN2O2
4-Chloro-2-(tert-butyl)pyrimidine-5-boronic acid 4-Chloro-2-(tert-butyl)pyrimidine-5-boronic acid 2225171-72-0 C8H12BClN2O2
4-ethylthiophen-2-ylboronic acid 4-ethylthiophen-2-ylboronic acid 1142946-75-5 C6H9BO2S
2-Fluoro-6-(4-methoxyphenyl)-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)p... 2-Fluoro-6-(4-methoxyphenyl)-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)p... 2710289-93-1 C18H21BFNO3
(4-Chloro-3,5-dimethoxyphenyl)boronic acid (4-Chloro-3,5-dimethoxyphenyl)boronic acid 427886-21-3 C8H10BClO4
2-Chloro-4-(2-methylimidazol-1-yl)phenylboronic acid 2-Chloro-4-(2-methylimidazol-1-yl)phenylboronic acid 2225179-20-2 C10H10BClN2O2
2-[3'-ブロモ[1,1'-ビフェニル]-3-イル]-4,6-ジフェニル-1,3,5-トリアジン 2-[3'-ブロモ[1,1'-ビフェニル]-3-イル]-4,6-ジフェニル-1,3,5-トリアジン 1606981-69-4 C27H18BrN3
methyl 4-cyano-2-cyclopropyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzoate methyl 4-cyano-2-cyclopropyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzoate 2819707-82-7 C18H22BNO4
4-(2-Methoxyphenyl)furan-2-boronic acid pinacol ester 4-(2-Methoxyphenyl)furan-2-boronic acid pinacol ester 1402173-05-0 C17H21BO4
4-FLUORO-3-(METHYLCARBAMOYL)BENZENEBORONIC ACID 4-FLUORO-3-(METHYLCARBAMOYL)BENZENEBORONIC ACID 874219-19-9 C8H9BFNO3
1-cyclopentyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrrole 1-cyclopentyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrrole 2223046-27-1 C15H24BNO2
4-(4-Trifluoromethylphenyl)thiazole-5-boronic acid pinacol ester 4-(4-Trifluoromethylphenyl)thiazole-5-boronic acid pinacol ester 2223041-93-6 C16H17BF3NO2S
4-Chloro-2-(4-hydroxypiperidino)pyrimidine-5-boronic acid 4-Chloro-2-(4-hydroxypiperidino)pyrimidine-5-boronic acid 2225172-86-9 C9H13BClN3O3
(3-chloro-4-(methyl-d3)phenyl)boronic acid (3-chloro-4-(methyl-d3)phenyl)boronic acid 2241870-94-8 C7H5BClD3O2
2-(N-diphenylmethylene)thiazole-4-boronic acid pinacol ester 2-(N-diphenylmethylene)thiazole-4-boronic acid pinacol ester 2223011-13-8 C22H23BN2O2S
(6-cyclobutylpyridin-3-yl)boronic acid (6-cyclobutylpyridin-3-yl)boronic acid 2225169-78-6 C9H12BNO2
(2-fluoro-3-methylphenyl-4,5,6-d3)boronic acid (2-fluoro-3-methylphenyl-4,5,6-d3)boronic acid 2819702-13-9 C7H8BFO2
2-イソプロピルマロン酸ジメチル 2-イソプロピルマロン酸ジメチル 51122-91-9 C8H14O4
5-Bromo-4-methylpyridine-4-boronic acid 5-Bromo-4-methylpyridine-4-boronic acid 2121511-49-5 C6H7BBrNO2
4-(Cyclohexyl)thiophene-2-boronic acid pinacol ester 4-(Cyclohexyl)thiophene-2-boronic acid pinacol ester 1402166-54-4 C16H25BO2S
TAK-931 TAK-931 1330782-76-7 C17H19N5OS
methyl 4-cyano-3-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzoate methyl 4-cyano-3-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzoate 2819707-83-8 C16H20BNO4
4'-ヒドロキシ[1,1'-ビフェニル]-4-カルボン酸メチル 4'-ヒドロキシ[1,1'-ビフェニル]-4-カルボン酸メチル 40501-41-5 C14H12O3
(4-((methyl-d3)thio)phenyl)boronic acid (4-((methyl-d3)thio)phenyl)boronic acid 2241867-01-4 C7H6BD3O2S
2-Methyl-4-(1H-pyrazol-1-yl)phenylboronic acid pinacol ester 2-Methyl-4-(1H-pyrazol-1-yl)phenylboronic acid pinacol ester 858523-46-3 C16H21BN2O2
2-Methyl-5-cyano-3-cyclopropylphenylboronic acid pinacol ester 2-Methyl-5-cyano-3-cyclopropylphenylboronic acid pinacol ester 2223040-47-7 C17H22BNO2
3-Fluoro-4-(piperidin-3-yl)phenylboronic acid 3-Fluoro-4-(piperidin-3-yl)phenylboronic acid 2225153-11-5 C11H15BFNO2
(3-(methyl-d3)-5-(trifluoromethyl)phenyl)boronic acid (3-(methyl-d3)-5-(trifluoromethyl)phenyl)boronic acid 2241866-82-8 C8H5BD3F3O2
5-(3-Fluorophenyl)thiophene-2-boronic acid pinacol ester 5-(3-Fluorophenyl)thiophene-2-boronic acid pinacol ester 1402174-30-4 C16H18BFO2S
5-(2-Furyl)thiophene-2-boronic acid pinacol ester 5-(2-Furyl)thiophene-2-boronic acid pinacol ester 2223031-90-9 C14H17BO3S
(2-fluoro-5-(methyl-d3)phenyl)boronic acid (2-fluoro-5-(methyl-d3)phenyl)boronic acid 2241871-07-6 C7H8BFO2
3-(tert-Butyl)-5-(2-thienyl)phenylboronic acid 3-(tert-Butyl)-5-(2-thienyl)phenylboronic acid 2225176-64-5 C14H17BO2S
3-(Cyclobutyl)thiophene-2-boronic acid 3-(Cyclobutyl)thiophene-2-boronic acid 2225173-48-6 C8H11BO2S
4-(Cyclopentyl)thiophene-2-boronic acid 4-(Cyclopentyl)thiophene-2-boronic acid 2225179-88-2 C9H13BO2S
5-(Diethylamino)thiophene-2-boronic acid 5-(Diethylamino)thiophene-2-boronic acid 1972612-55-7 C8H14BNO2S
2-Cyano-4-(imidazol-1-yl)phenylboronic acid pinacol ester 2-Cyano-4-(imidazol-1-yl)phenylboronic acid pinacol ester 2223032-81-1 C16H18BN3O2
4-(Thiazol-2-yl)thiophene-2-boronic acid 4-(Thiazol-2-yl)thiophene-2-boronic acid 2225176-32-7 C7H6BNO2S2
(3-(azetidin-3-yl)phenyl)boronic acid (3-(azetidin-3-yl)phenyl)boronic acid 2256708-81-1 C9H12BNO2
(4-(ethyl-d5)-2-fluorophenyl)boronic acid (4-(ethyl-d5)-2-fluorophenyl)boronic acid 2241871-48-5 C8H5BD5FO2
4-(3-Thienyl)furan-2-boronic acid pinacol ester 4-(3-Thienyl)furan-2-boronic acid pinacol ester 2223011-21-8 C14H17BO3S
[2-Ethyl-4-(iso-propyl)-d12]-thiazole-5-boronic acid pinacol ester [2-Ethyl-4-(iso-propyl)-d12]-thiazole-5-boronic acid pinacol ester 2223040-76-2 C14H24BNO2S
5-(2-Methoxyphenyl)thiazole-4-boronic acid pinacol ester 5-(2-Methoxyphenyl)thiazole-4-boronic acid pinacol ester 2223030-58-6 C16H20BNO3S
4-fluoro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2(1H)-one 4-fluoro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2(1H)-one 2710294-34-9 C11H15BFNO3
POTASSIUM PENTABORATE OCTAHYDRATE*SIGMA GRADE POTASSIUM PENTABORATE OCTAHYDRATE*SIGMA GRADE 11128-29-3 B5KO15-14
1-[4-(1,1-Dimethylethyl)phenyl]-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-y... 1-[4-(1,1-Dimethylethyl)phenyl]-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-y... 1402233-29-7 C19H27BN2O2
15-Keto Travoprost 15-Keto Travoprost 404830-45-1 C26H33F3O6
4-Methoxycarbonyl-3-(ethyl-d5)-phenylboronic acid 4-Methoxycarbonyl-3-(ethyl-d5)-phenylboronic acid 2225170-26-1 C10H8BD5O4
1-ホルミル-3-(ジメチルアミノ)ベンゼン 1-ホルミル-3-(ジメチルアミノ)ベンゼン 619-22-7 C9H11NO
4,4,5,5-Tetramethyl-2-[4-(3-oxetanyl)-2-(trifluoromethyl)phenyl]-1,3,2-dioxaborolane 4,4,5,5-Tetramethyl-2-[4-(3-oxetanyl)-2-(trifluoromethyl)phenyl]-1,3,2-dioxaborolane 2223055-54-5 C16H20BF3O3
5-ブロモ-2-クロロ-4-(トリフルオロメチル)フェニルボロン酸 5-ブロモ-2-クロロ-4-(トリフルオロメチル)フェニルボロン酸 1452574-71-8 C7H4BBrClF3O2
2-(2-cyclopropyl-5-(1,4-dioxan-2-yl)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane 2-(2-cyclopropyl-5-(1,4-dioxan-2-yl)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane 2223005-29-4 C19H27BO4
1-cyclopropyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2(1H)-one 1-cyclopropyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2(1H)-one 2388985-08-6 C14H20BNO3
(2,3-dimethyl-4-pyridinyl)boronic acid (2,3-dimethyl-4-pyridinyl)boronic acid 1246829-05-9 C7H10BNO2
Boronic acid, B-[2-(2-furanyl)phenyl]- Boronic acid, B-[2-(2-furanyl)phenyl]- 2225173-09-9 C10H9BO3
(2,4-dimethylphenyl-3,5,6-d3)boronic acid (2,4-dimethylphenyl-3,5,6-d3)boronic acid 2710290-94-9 C8H8BD3O2
3-Methyl-6-(ethyl-d5)-phenylboronic acid 3-Methyl-6-(ethyl-d5)-phenylboronic acid 2225172-81-4 C9H13BO2
2-(4-Methylimidazol-1-yl)pyridine-4-boronic acid 2-(4-Methylimidazol-1-yl)pyridine-4-boronic acid 1644055-65-1 C9H10BN3O2
5-(4-Trifluoromethylphenyl)thiazole-4-boronic acid pinacol ester 5-(4-Trifluoromethylphenyl)thiazole-4-boronic acid pinacol ester 2223029-20-5 C16H17BF3NO2S
(+)-6,6'-{[(1R,3R)-1,3-ジメチル-1,3-プロパンジイル]ビス(オキシ)}ビス[4,8-ビス(t-ブチル)-2,10-ジメトキシ-ビベンゾ[d,f][1,3,2]ジオキサホスフェピン], min. 95% (R,R)-Chiraphite(R,R)-キラファイト (+)-6,6'-{[(1R,3R)-1,3-ジメチル-1,3-プロパンジイル]ビス(オキシ)}ビス[4,8-ビス(t-ブチル)-2,10-ジメトキシ-ビベンゾ[d,f][1,3,2]ジオキサホスフェピン], min. 95% (R,R)-Chiraphite(R,R)-キラファイト 149646-83-3 C49H66O10P2
ethyl methyl oxalate ethyl methyl oxalate 615-52-1 C5H8O4
5-(iso-Propyl)pyridine-3-boronic acid 5-(iso-Propyl)pyridine-3-boronic acid 2225180-66-3 C8H12BNO2
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