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    —— octadecyloxyethyl 9-[2-(phosphonomethoxy)ethyl]guanine —— C28H52N5O6P
    octadecyloxyethyl 9-[2-(phosphonomethoxy)ethyl]guanine
    —— O-allyl-N,N-diisopropylhydroxylamine —— C9H19NO
    O-allyl-N,N-diisopropylhydroxylamine
    —— ochraceolide A —— C30H44O3
    ochraceolide A
    —— octadecyl 4-(3-hydroxyphenyl)-6-methyl-2-thioxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate —— C30H48N2O3S
    octadecyl 4-(3-hydroxyphenyl)-6-methyl-2-thioxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate
    —— O-(1-chlorobutoxy) S-ethyl thiocarbonate —— C7H13ClO2S
    O-(1-chlorobutoxy) S-ethyl thiocarbonate
    —— O-(1-chloro-2-methylpropyl) S-ethyl carbonothioate —— C7H13ClO2S
    O-(1-chloro-2-methylpropyl) S-ethyl carbonothioate
    —— O-benzyl-N-((2S,3R,4R,6R)-6-methoxy-3-(methoxymethoxy)-2,4-dimethyltetrahydro-2H-pyran-4-yl)hydroxylamine —— C17H27NO5
    O-benzyl-N-((2S,3R,4R,6R)-6-methoxy-3-(methoxymethoxy)-2,4-dimethyltetrahydro-2H-pyran-4-yl)hydroxylamine
    —— O-(N-methyl-N-phenyl-carbamoylmethyl)N'-dichloroacetyl-hydrazine-N-thiocarboxylate —— C12H13Cl2N3O3S
    O-(N-methyl-N-phenyl-carbamoylmethyl)N'-dichloroacetyl-hydrazine-N-thiocarboxylate
    —— O,O-dipropyl Te-phenyl tellurophosphonate —— C12H19O3PTe
    O,O-dipropyl Te-phenyl tellurophosphonate
    —— O,O-diphenyl Te-phenyl tellurophosphonate —— C18H15O3PTe
    O,O-diphenyl Te-phenyl tellurophosphonate
    —— O,O-di-iso-propyl Te-phenyl tellurophosphonate —— C12H19O3PTe
    O,O-di-iso-propyl Te-phenyl tellurophosphonate
    —— O-methyl-O-(α-trichloromethyl-β,β-dichlorovinyl) isocyanatophosphate —— C5H3Cl5NO4P
    O-methyl-O-(α-trichloromethyl-β,β-dichlorovinyl) isocyanatophosphate
    —— octa acid —— C96H64O32
    octa acid
    —— octakis(3-acetoxypropyl)octasilsesquioxane —— C40H72O28Si8
    octakis(3-acetoxypropyl)octasilsesquioxane
    —— O-ethyl-N,N,N',N'-tetramethylisouronium trifluoromethanesulfonate —— CF3O3S*C7H17N2O
    O-ethyl-N,N,N',N'-tetramethylisouronium trifluoromethanesulfonate
    —— O<sup>2</sup>-[(2R,3aR,4R)-2-(tetrahydropyran-2-yloxymethyl)hexahydropyrrolo[1,2-b]isoxazol-4-yl]-N<sup>3</sup>-(benzoyl)thymine —— C24H29N3O6
    O<sup>2</sup>-[(2R,3aR,4R)-2-(tetrahydropyran-2-yloxymethyl)hexahydropyrrolo[1,2-b]isoxazol-4-yl]-N<sup>3</sup>-(benzoyl)thymine
    —— O<sup>2',3</sup>-bis(t-butyldimethylsilyl)-10-ethyl-10-desmethyl-erythralosamine —— C42H79NO8Si2
    O<sup>2',3</sup>-bis(t-butyldimethylsilyl)-10-ethyl-10-desmethyl-erythralosamine
    —— o-methyl-N-(5-methylfurfuryl)aniline —— C13H15NO
    o-methyl-N-(5-methylfurfuryl)aniline
    —— o-(N-benzylamino)benzyldimethylamine —— C16H20N2
    o-(N-benzylamino)benzyldimethylamine
    —— o-methylphenyl 3-benzoic acid ethyl ester urea —— C17H18N2O3
    o-methylphenyl 3-benzoic acid ethyl ester urea
    —— oxiranyl trifluoromethanesulfonate —— C4H5F3O4S
    oxiranyl trifluoromethanesulfonate
    —— O-phenyl N-3-nitrophenylthioncarbamate —— C13H10N2O3S
    O-phenyl N-3-nitrophenylthioncarbamate
    —— (-)-O-(R)-8-[(3S,6S,9S,13S,14aR)-9-benzyl-6-ethyl-6,13-dimethyl-1,4,7,10-tetraoxotetradecahydropyrrolo[1,2-a]-[1,4,7,10]tetraazacyclododecin-3-yl]-3-oxooctan-2-yl O-phenyl carbonothioate —— C37H48N4O7S
    (-)-O-(R)-8-[(3S,6S,9S,13S,14aR)-9-benzyl-6-ethyl-6,13-dimethyl-1,4,7,10-tetraoxotetradecahydropyrrolo[1,2-a]-[1,4,7,10]tetraazacyclododecin-3-yl]-3-oxooctan-2-yl O-phenyl carbonothioate
    —— o-ethoxy trans-cinnamic acid methyl ester —— C12H14O3
    o-ethoxy trans-cinnamic acid methyl ester
    —— O-phenyl 4-(2-chloroethyl)piperidine-1-carbothioate —— C14H18ClNOS
    O-phenyl 4-(2-chloroethyl)piperidine-1-carbothioate
    —— O-(4-methoxyphenyl) O-phenyl thiocarbonate —— C14H12O3S
    O-(4-methoxyphenyl) O-phenyl thiocarbonate
    —— O-phenyl 4-(trifluoromethyl)benzothioate —— C14H9F3OS
    O-phenyl 4-(trifluoromethyl)benzothioate
    —— O-(1-(1-benzyl-1H-pyrazol-4-yl)-2,2,2-trifluoroethyl) O-phenyl carbonothioate —— C20H17F3N2O2S
    O-(1-(1-benzyl-1H-pyrazol-4-yl)-2,2,2-trifluoroethyl) O-phenyl carbonothioate
    —— O-(5-((tert-butyldimethylsilyloxy)methyl)-1,3,4-oxadiazol-2-yl)(5,6-dichloropyridin-3-yl)methyl O-phenylcarbonothioate —— C22H25Cl2N3O4SSi
    O-(5-((tert-butyldimethylsilyloxy)methyl)-1,3,4-oxadiazol-2-yl)(5,6-dichloropyridin-3-yl)methyl O-phenylcarbonothioate
    —— o-phenyl (4-fluorophenyl)carbamothioate —— C13H10FNOS
    o-phenyl (4-fluorophenyl)carbamothioate
    —— O,O-diethyl 2-nitro-thien-4-ylhydroxymethylphosphonate —— C9H14NO6PS
    O,O-diethyl 2-nitro-thien-4-ylhydroxymethylphosphonate
    —— O-ethoxycarbonyl-(R)-2-hydroxyheptanonitrile —— C10H17NO3
    O-ethoxycarbonyl-(R)-2-hydroxyheptanonitrile
    —— O-ethoxycarbonyl-(S)-2-hydroxyheptanonitrile —— C10H17NO3
    O-ethoxycarbonyl-(S)-2-hydroxyheptanonitrile
    —— oxalic acid amide-<i>sec</i>-butylidenehydrazide —— C6H11N3O2
    oxalic acid amide-<i>sec</i>-butylidenehydrazide
    —— O,O-Diethyl [2-(4-methyl)phenoxy-5-nitro]phenylhydroxymethylphosphonate —— C18H22NO7P
    O,O-Diethyl [2-(4-methyl)phenoxy-5-nitro]phenylhydroxymethylphosphonate
    —— O,O-diethyl [N-methyl-N-(methylsulfonyl)aminomethyl]phosphonate —— C7H18NO5PS
    O,O-diethyl [N-methyl-N-(methylsulfonyl)aminomethyl]phosphonate
    —— oxalyl chloride —— C2H2Cl2O2
    oxalyl chloride
    —— O,O-di(tert-butoxycarbonyl)-1,3-propanediol —— C13H24O6
    O,O-di(tert-butoxycarbonyl)-1,3-propanediol
    —— O-(3-(5-trifluoromethyl-pyridin-2-yloxy)propyl)hydroxylamine —— C9H11F3N2O2
    O-(3-(5-trifluoromethyl-pyridin-2-yloxy)propyl)hydroxylamine
    —— O-isopropyl-N,N-di-n-propylthiocarbamate —— C10H21NOS
    O-isopropyl-N,N-di-n-propylthiocarbamate
    —— O-benzyl-N-(2-phenyl-allyl)-hydroxylamine —— C16H17NO
    O-benzyl-N-(2-phenyl-allyl)-hydroxylamine
    —— (o-propenylphenoxy)propanoic acid —— C12H14O3
    (o-propenylphenoxy)propanoic acid
    —— O-(2-methoxy-ethyl)-lactic acid 200617-09-0 C6H12O4
    O-(2-methoxy-ethyl)-lactic acid
    —— O-isopentyl-lactic acid 875231-56-4 C8H16O3
    O-isopentyl-lactic acid
    —— oxiranylmethyl radical —— C3H5O
    oxiranylmethyl radical
    —— O-Dimethylcarbamoyl-hydroxylamin —— C3H8N2O2
    O-Dimethylcarbamoyl-hydroxylamin
    —— o-benzyloxybenzoic acid allylamide —— C17H17NO2
    o-benzyloxybenzoic acid allylamide
    —— O-methyl-S-(2-carboxyethyl)-O-(4-nitrophenyl)thiophosphate —— C10H12NO6PS2
    O-methyl-S-(2-carboxyethyl)-O-(4-nitrophenyl)thiophosphate
    —— O-(2,3,5-tri-O-benzyl-β-D-ribofuranosyl)-(1->3)-2,4-di-O-benzyl-L-rhamnopyranose —— C46H50O9
    O-(2,3,5-tri-O-benzyl-β-D-ribofuranosyl)-(1->3)-2,4-di-O-benzyl-L-rhamnopyranose
    —— oxiran-2-ylmethyl-2-(tert-butoxycarbonylamino)-3-(4-(3,5-diiodo-4-(oxiran-2-ylmethoxy)phenoxy)-3,5-diiodophenyl)propanoate —— C26H27I4NO8
    oxiran-2-ylmethyl-2-(tert-butoxycarbonylamino)-3-(4-(3,5-diiodo-4-(oxiran-2-ylmethoxy)phenoxy)-3,5-diiodophenyl)propanoate