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    —— (4-acridin-9-ylamino-phenoxy)-acetic acid 64895-14-3 C21H16N2O3
    (4-acridin-9-ylamino-phenoxy)-acetic acid
    —— 4-difluoromethylene thia-cyclohexane 77471-71-7 C6H8F2S
    4-difluoromethylene thia-cyclohexane
    —— 4,5-Bis(nitratomethyl)furoxan 57449-44-2 C4H4N4O8
    4,5-Bis(nitratomethyl)furoxan
    —— 4,7-Dicyan<2.2>paracyclophan 61135-78-2 C18H14N2
    4,7-Dicyan<2.2>paracyclophan
    —— 4-Quinolinol, 1,2,3,4-tetrahydro-2,6-dimethyl-, hydrochloride 32488-33-8 C11H16ClNO
    4-Quinolinol, 1,2,3,4-tetrahydro-2,6-dimethyl-, hydrochloride
    —— 4-(Acetyl-methyl-amino)-pyridin-1-oxid 54818-74-5 C8H10N2O2
    4-(Acetyl-methyl-amino)-pyridin-1-oxid
    —— 4a-methyl-2,3-dihydro-4a<i>H</i>-cyclopenta[2,3]azirino[2,1-<i>b</i>]thiazol-7-one 71310-16-2 C8H9NOS
    4a-methyl-2,3-dihydro-4a<i>H</i>-cyclopenta[2,3]azirino[2,1-<i>b</i>]thiazol-7-one
    —— 4-(3-Carboxypropionyl)naphthalindicarbonsaeure-anhydrid 65805-75-6 C16H10O6
    4-(3-Carboxypropionyl)naphthalindicarbonsaeure-anhydrid
    —— {4-[4-(2,3-dihydroxy-propoxy)-acridin-9-ylamino]-phenyl}-acetic acid 64895-11-0 C24H22N2O5
    {4-[4-(2,3-dihydroxy-propoxy)-acridin-9-ylamino]-phenyl}-acetic acid
    —— 4,4'-(1,4-Butanediylbis(oxy))bis(3-chlorobenzencarboximidamide) 125880-74-2 C18H20Cl2N4O2
    4,4'-(1,4-Butanediylbis(oxy))bis(3-chlorobenzencarboximidamide)
    —— 4,5-dihydrothiazolo<4,5-f>quinoline 153260-27-6 C10H8N2S
    4,5-dihydrothiazolo<4,5-f>quinoline
    —— 4-(N-Methyl-N-cyanoethyl)-aminoazobenzol 31464-26-3 C16H16N4
    4-(N-Methyl-N-cyanoethyl)-aminoazobenzol
    —— 4-Butoxy-1,3-benzenediamine dihydrochloride 76486-09-4 C10H18Cl2N2O
    4-Butoxy-1,3-benzenediamine dihydrochloride
    —— 4-(4-carbamoyl-acridin-9-ylamino)-benzoic acid 64894-96-8 C21H15N3O3
    4-(4-carbamoyl-acridin-9-ylamino)-benzoic acid
    —— 4-(2,4-dinitro-phenylsulfanyl)-1<i>H</i>-pyrimidin-2-one 73768-70-4 C10H6N4O5S
    4-(2,4-dinitro-phenylsulfanyl)-1<i>H</i>-pyrimidin-2-one
    —— 4-O-Methylaclacinomycin T 80930-65-0 C31H37NO10
    4-O-Methylaclacinomycin T
    —— 4-Oxo-3-<4H>-chinazolinacetamid 16347-71-0 C10H9N3O2
    4-Oxo-3-<4H>-chinazolinacetamid
    —— 4'-(9-acridinylamino)-3'-methoxyethanesulfonanilide methanesulfonate 59988-01-1 CH4O3S*C22H21N3O3S
    4'-(9-acridinylamino)-3'-methoxyethanesulfonanilide methanesulfonate
    —— 4H-Dibenzo(de,g)quinoline-1,4-diol, 5,6,6a,7-tetrahydro-2,10,11-trimethoxy-6-methyl-, (4S-cis)- 88244-73-9 C20H23NO5
    4H-Dibenzo(de,g)quinoline-1,4-diol, 5,6,6a,7-tetrahydro-2,10,11-trimethoxy-6-methyl-, (4S-cis)-
    —— 4-[2-(4-methoxyphenyl)ethoxy]quinazoline 124427-76-5 C17H16N2O2
    4-[2-(4-methoxyphenyl)ethoxy]quinazoline
    —— 4-(Acetyloxy)decahydro-6a-hydroxy-8a-methyl-3,6-bis(methylene)oxireno(2,3)azuleno(4,5-b)furan-2(3H)-one 33204-40-9 C17H20O6
    4-(Acetyloxy)decahydro-6a-hydroxy-8a-methyl-3,6-bis(methylene)oxireno(2,3)azuleno(4,5-b)furan-2(3H)-one
    —— 4-butyl-1,2-diphenylpyrazolidine-3,5-dione;piperidine 34207-03-9 C24H31N3O2
    4-butyl-1,2-diphenylpyrazolidine-3,5-dione;piperidine
    —— 4-(hydroxymethyl)benzo<a>pyrene 86073-01-0 C21H14O
    4-(hydroxymethyl)benzo<a>pyrene
    —— 4-Chlorophenol;5-methyl-2-propan-2-ylcyclohexan-1-ol;1,7,7-trimethylbicyclo[2.2.1]heptan-2-one —— C26H41ClO3
    4-Chlorophenol;5-methyl-2-propan-2-ylcyclohexan-1-ol;1,7,7-trimethylbicyclo[2.2.1]heptan-2-one
    —— 4-[(4-Anilino-5-sulfonaphthalen-1-yl)diazenyl]-5-hydroxynaphthalene-2,7-disulfonic acid;guanidine —— C29H34N12O10S3
    4-[(4-Anilino-5-sulfonaphthalen-1-yl)diazenyl]-5-hydroxynaphthalene-2,7-disulfonic acid;guanidine
    —— 4-Tert-butyl-2-(3-methyl-2-oxopyrrolidin-1-yl)furan-3-carbonitrile 92338-66-4 C14H18N2O2
    4-Tert-butyl-2-(3-methyl-2-oxopyrrolidin-1-yl)furan-3-carbonitrile
    —— 4-Propoxy-2-(3-(trifluoromethyl)phenyl)-6-(4-(trifluoromethyl)phenyl)pyridine 136490-15-8 C22H17F6NO
    4-Propoxy-2-(3-(trifluoromethyl)phenyl)-6-(4-(trifluoromethyl)phenyl)pyridine
    —— 4-(N-Propionylanilino)-1-<2-(2-thienyl)ethyl>-4-piperidincarbonsaeure-methylester-oxalat 61086-45-1 C2H2O4*C22H28N2O3S
    4-(N-Propionylanilino)-1-<2-(2-thienyl)ethyl>-4-piperidincarbonsaeure-methylester-oxalat
    —— (4-Ethenylpyridin-1-ium-1-yl)acetate--hydrogen bromide (1/1) 72719-54-1 C9H10BrNO2
    (4-Ethenylpyridin-1-ium-1-yl)acetate--hydrogen bromide (1/1)
    —— 4-ethenyl-5H-acephenanthrylen-4-ol 98677-90-8 C18H14O
    4-ethenyl-5H-acephenanthrylen-4-ol
    —— 4-(2,6-Dimethylphenyl)-1-methylpyridin-1-ium 122268-84-2 C14H16N+
    4-(2,6-Dimethylphenyl)-1-methylpyridin-1-ium
    —— (4-Chloro-phenyl)-(5,7-dibromo-benzofuran-2-yl)-methanone 83806-70-6 C15H7Br2ClO2
    (4-Chloro-phenyl)-(5,7-dibromo-benzofuran-2-yl)-methanone
    —— [4-(4-nitrophenyl)phenyl] N-(4-methylphenyl)carbamate 122861-84-1 C20H16N2O4
    [4-(4-nitrophenyl)phenyl] N-(4-methylphenyl)carbamate
    —— 4,5,6,7-Tetrahydro-3-(1-methyl-5-nitro-1H-imidazol-2-yl)-1,2-benzisoxazol-7a(3aH)-ol 90594-10-8 C11H14N4O4
    4,5,6,7-Tetrahydro-3-(1-methyl-5-nitro-1H-imidazol-2-yl)-1,2-benzisoxazol-7a(3aH)-ol
    —— 4-[5-(4-heptyl-cyclohexyl)-pyrimidin-2-yl]-benzonitrile 116265-98-6 C24H31N3
    4-[5-(4-heptyl-cyclohexyl)-pyrimidin-2-yl]-benzonitrile
    —— 4-tert-butyl-7-chloro-3,4-dihydro-9-methyl-1H-1,4-benzodiazepine-2,5-dione 167690-08-6 C14H17ClN2O2
    4-tert-butyl-7-chloro-3,4-dihydro-9-methyl-1H-1,4-benzodiazepine-2,5-dione
    —— 4-[(4-Chlorophenyl)(phenyl)methyl]-1-methylpiperazin-2-one 95088-22-5 C18H19ClN2O
    4-[(4-Chlorophenyl)(phenyl)methyl]-1-methylpiperazin-2-one
    —— 4''-Hydroxycannabinol-7-oic acid 66280-07-7 C21H24O5
    4''-Hydroxycannabinol-7-oic acid
    —— 4-propan-2-yloctanoic Acid 107265-20-3 C11H22O2
    4-propan-2-yloctanoic Acid
    —— 4-Dibenzofuranol, 2,3,7,8-tetrachloro- 123566-86-9 C12H4Cl4O2
    4-Dibenzofuranol, 2,3,7,8-tetrachloro-
    —— (4R,5R)-9-Fluoro-4,5-dihydrobenzo(a)pyrene-4,5-diol 88054-33-5 C20H13FO2
    (4R,5R)-9-Fluoro-4,5-dihydrobenzo(a)pyrene-4,5-diol
    —— 4(5H)-Pyrimidinone, 2-((3,3,3-trifluoro-2-oxopropyl)thio)- 127183-48-6 C7H5F3N2O2S
    4(5H)-Pyrimidinone, 2-((3,3,3-trifluoro-2-oxopropyl)thio)-
    —— 4-Hydroxypenbutolol-4-sulfate 112160-86-8 C18H29NO6S
    4-Hydroxypenbutolol-4-sulfate
    —— 4-n-propyl-1-(4-(1,2-dibromoethyl)phenyl)-2,6,7-trioxabicyclo[2.2.2]octane 108614-55-7 C16H20Br2O3
    4-n-propyl-1-(4-(1,2-dibromoethyl)phenyl)-2,6,7-trioxabicyclo[2.2.2]octane
    —— 4(5H)-Pyrimidinone, 1,1,1-trifluoro-3-(2-pyrimidinylthio)- 127183-44-2 C7H5F3N2OS
    4(5H)-Pyrimidinone, 1,1,1-trifluoro-3-(2-pyrimidinylthio)-
    —— 4-N-butan-2-yl-6-chloro-2-N-(2-phenylpropan-2-yl)-1,3,5-triazine-2,4-diamine 116145-96-1 C16H22ClN5
    4-N-butan-2-yl-6-chloro-2-N-(2-phenylpropan-2-yl)-1,3,5-triazine-2,4-diamine
    —— 4-O-dodecyl 1-O-hexyl butanedioate 54303-71-8 C22H42O4
    4-O-dodecyl 1-O-hexyl butanedioate
    —— 4-Isopropyl-m-terphenyl 22370-92-9 C21H20
    4-Isopropyl-m-terphenyl
    —— 4-amino-5-chloro-N-(1-hydroxypiperidin-4-yl)-2-methoxybenzamide 76773-84-7 C13H18ClN3O3
    4-amino-5-chloro-N-(1-hydroxypiperidin-4-yl)-2-methoxybenzamide
    —— 4-Acetoxy-3-carboxy-phenylalanin 3641-48-3 C12H13NO6
    4-Acetoxy-3-carboxy-phenylalanin