• 4-Oxazolecarboxylicacid, 2-(4-hydroxyphenyl)-, ethyl ester
• 200400-76-6
• C₁₂H₁₁NO₄
• 233.22
• .

• 4-(Hexadecylamino)benzylamine
• 84670-96-2
• C₂₃H₄₂N₂
• 346.59
• .

• 4-Pentenoic acid,5-(4-fluorophenyl)-, (4E)-
• 190595-67-6
• C₁₁H₁₁FO₂
• 194.20
• .

• 4,4'-Bipyridine,hydrate (1:?)
• 123333-55-1
• C₁₀H₈N₂.xH₂O
• 174.20
• .

• 4-Pyridinemethanamine,2,6-dichloro-
• 88579-63-9
• C6H6 Cl2 N2
• 177.03
• .

• 4-Pyridinecarbonitrile,2,6-dichloro-
• 32710-65-9
• C₆H₂Cl₂N₂
• 173.00
• .

• 4,6(1H,5H)-Pyrimidinedione,2-(methylthio)-
• 29639-68-7
• C₅H₆N₂O₂S
• 217-839-5
• 158.18
• .

• 4-(2,4-Dichlorophenyl)-1H-pyrrole-3-carbonitrile
• 87388-06-5
• C₁₁H₆Cl₂N₂
• 237.09
• .

• 4-Pyridinecarboxamide,2,6-dichloro-
• 89281-13-0
• C₆H₄Cl₂N₂O
• 191.02
• .

• 4-Piperidinone,1-cyclobutyl-
• 359880-05-0
• C₉H₁₅NO
• 153.22
• .

• 4-Imidazolidinepropanenitrile,2,5-dioxo-
• 1007-06-3
• C6H7 N3 O2
• 153.14
• .

• 4H-4a,7-Methanooxazirino[3,2-i][2,1]benzisothiazole,tetrahydro-9,9-dimethyl-, 3,3-dioxide, (4aR,7S,8aR)-
• 104372-31-8
• C₁₀H₁₅NO₃S
• 229.30
• .

• 4-Isothiazolecarboxylicacid, 2,3-dihydro-5-mercapto-3-oxo-, sodium salt (1:3)
• 76857-14-2
• C₄H₂NNa₃O₃S₂
• 245.16
• .

• 4-Chloro-6-methylpyrimidine
• 54198-82-2
• C₅H₅ClN₂
• 128.56
• .

• 4(3H)-Quinazolinone,6-(bromomethyl)-2-methyl-
• 112888-43-4
• C₁₀H₉BrN₂O
• 253.10
• .

• 4-Piperidinebutanoicacid, 1-[(1,1-dimethylethoxy)carbonyl]-
• 142247-38-9
• C₁₄H₂₅NO₄
• 271.35
• .

• 4-Bromo-3-fluoroanisole
• 408-50-4
• C₇H₆BrFO
• 205.03
• .

• 4-Morpholinecarboxylicacid, 6-oxo-2,3-diphenyl-, phenylmethyl ester, (2S,3R)-
• 105228-46-4
• C₂₄H₂₁NO₄
• 387.43
• .

• 4(3H)-Pyrimidinone,5-amino-2-methyl-
• 53135-22-1
• C5H7 N3 O
• 125.13
• .

• 4-Thiazoleacetic acid,2-amino-a-[(carboxymethoxy)imino]-, (aZ)-
• 74440-05-4
• C7H7 N3 O5 S
• 245.21
• .

• 4H-Azepin-4-one,1-benzoylhexahydro-
• 15923-40-7
• C₁₃H₁₅NO₂
• 217.27
• .

• 4-Amino-6-nitroresorcinol hydrochloride
• 883566-55-0
• C₆H₆N₂O₄^.HCl
• 206.58
• .

• 4-Pyridinamine,2-(trifluoromethyl)-
• 147149-98-2
• C₆H₅F₃N₂
• 162.12
• .

• 4-Aminomethylstyrene-divinylbenzene copolymer
• 78578-28-6
• (C₁₀H₁₀)_n^.(C₉H₁₁N)_n
• 239-268-0
• 207.24
• .

• 4-Thiazoleacetic acid,2-amino-a-[(1-carboxy-1-methylethoxy)imino]-,(Z)- (9CI)
• 102507-85-7
• C₉H₁₁N₃O₅S
• 273.27
• .

• 4-Thiazoleacetic acid,2-amino-a-[[2-(diphenylmethoxy)-1,1-dimethyl-2-oxoethoxy]imino]-,(Z)- (9CI)
• 80542-76-3
• C22H21 N3 O5 S
• 安全数据
• 273.27
• .

• 4-Morpholinecarboxylicacid, 6-oxo-2,3-diphenyl-, phenylmethyl ester, (2R,3S)-
• 100516-54-9
• C24H21 N O4
• 387.43
• .

• 4-Pyridinamine,2-ethoxy-
• 89943-12-4
• C7H10 N2 O
• 138.17
• .

• 4H-Cyclopentathiazol-2-amine,5,6-dihydro-, hydrochloride (1:1)
• 82514-58-7
• C₆H₈N₂S.ClH
• 176.67
• .

• 4-Piperidinone,1-(3-pyridinylmethyl)-
• 41661-57-8
• C11H14 N2 O
• 190.24
• .

• 4-Pyridinol, 3-bromo-
• 36953-41-0
• C5H4 Br N O
• 173.99
• .

• 4H-1-Benzopyran-4-one,2,3-dihydro-7-hydroxy-5-methoxy-2-phenyl-
• 1090-65-9
• C₁₆H₁₄O₄
• 270.28
• .

• 4(3H)-Pyrimidinone,2-amino-6-hydroxy-5-nitro-
• 80466-56-4
• C4H4 N4 O4
• 172.1
• .

• 4H-1-Benzopyran-3-carbonitrile,6-(1-methylethyl)-4-oxo-
• 50743-32-3
• C₁₃H₁₁NO₂
• 安全数据
• 213.23
• .

• 4-Piperidinamine,N-methyl-N-(phenylmethyl)-
• 76167-62-9
• C13H20 N2
• 204.31
• .

• 4-Piperidinepropanoicacid, b-amino-1-[(phenylmethoxy)carbonyl]-,ethyl ester
• 886362-29-4
• C₁₈H₂₆N₂O₄
• 334.41
• .

• 4-Piperidinone,1-(2,3-dihydro-1,4-benzodioxin-6-yl)-
• 250718-94-6
• C₁₃H₁₅NO₃
• 233.26
• .

• 4-Imidazolidinone,3-methyl-5-(1-methylpropyl)-2-thioxo-
• 704-06-3
• C8H14 N2 O S
• 186.27
• .

• 4H-4a,7-Methanooxazirino[3,2-i][2,1]benzisothiazole,tetrahydro-9,9-dimethyl-, 3,3-dioxide, (4aS,7R,8aS)-
• 104322-63-6
• C₁₀H₁₅NO₃S
• 229.30
• .

• 4-Hydroxyisoleucine
• 55399-93-4
• C₆H₁₃NO₃
• 147.1723
• .

• 4-Pentenoicacid, 2-amino-, hydrochloride (1:1), (2R)-
• 108412-04-0
• C₅H₁₀ClNO₂
• 221-672-3
• 151.59
• .

• 4-Pyridinecarboxaldehyde,3,5-dichloro-
• 136590-83-5
• C₆H₃Cl₂NO
• 176.0001
• .

• 4-Pyridinecarboxaldehyde,2-chloro-3-fluoro-
• 329794-28-7
• C₆H₃ClFNO
• 159.55
• .

• 4-Pyridinecarboxaldehyde,5-fluoro-1,2-dihydro-2-oxo-
• 500148-38-9
• C₆H₄FNO₂
• 141.0999
• .

• 4-Pyridinecarboxaldehyde,2,3,5-trifluoro-
• 266312-20-3
• C₆H₂F₃NO
• 161.08
• .

• 4-Pyridinecarboxaldehyde,3,5-dibromo-
• 70201-42-2
• C₆H₃Br₂NO
• 264.90212
• .

• 4-Pyridinecarboxaldehyde,1,2-dihydro-2-oxo-
• 188554-13-4
• C₆H₅NO₂
• 123.11
• .

• 4-Pyridinecarboxaldehyde,3,5-dichloro-2,6-difluoro-
• 17723-32-9
• C6H Cl2 F2 N O
• 211.98
• .

• 4-Pyridinecarboxaldehyde,3-nitro-
• 153813-70-8
• C₆H₄N₂O₃
• 152.11
• .

• 4-Pyridinecarboxaldehyde,3-hydroxy-2-methyl-
• 518306-10-0
• C7H7 N O2
• 137.14
• .