• Octadecanoic acid,10-(sulfooxy)-, 1,1',1''-(1,2,3-propanetriyl) ester, sodium salt (1:3)
• 14356-65-1
• C57H110 O18 S3 . 3 Na
• 238-323-6
• 1245.613
• .

• Orange Oil
• 8028-48-6
• 232-433-8
• .

• Oxirane,2-methyl-2-phenyl-
• 2085-88-3
• C9H10 O
• 134.18
• .

• Oxireno[3,4]benzo[1,2-h]quinoline,1a,8,9,9a-tetrahydro-
• 113163-24-9
• C13H11 N O
• 197.2325
• .

• Oxirane,2-(3-buten-1-yl)-
• 10353-53-4
• C6H10 O
• 233-771-9
• 98.14
• .

• Oxazole,5-(3,4-dimethoxyphenyl)-2-phenyl-
• 70216-32-9
• C17H15 N O3
• 0
• .

• Oldamin (TN)
• 2272-11-9
• C₂₀H₄₁NO₃
• 218-878-0
• 343.54444
• .

• Ostreogrycin
• 8065-94-9
• C₃₅H₅₈O₁₁
• 0
• .

• Oxirane,2,2',2''-[1,2,6-hexanetriyltris(oxymethylene)]tris-
• 68959-23-9
• C15H26 O6
• 273-407-6
• 302.36334
• .

• Olean-12-ene-3,15,16,22,28-pentol,22-(2-methyl-2-butenoate), (3b,15a,16a,22a)- (9CI)
• 29609-62-9
• C35H56 O6
• 202.4826
• .

• Oxayohimban-16-carboxylicacid, 16,17-didehydro-19-methyl-, methyl ester, (19b)-
• 25532-45-0
• C21H24 N2 O3
• 0
• .

• Oxirane,2-[2-(1-naphthalenyl)ethyl]-
• 111990-50-2
• C14H14 O
• 198.2604
• .

• Octanoic acid,8-chloro-6-hydroxy-, ethyl ester
• 1070-65-1
• C10H19 Cl O3
• 222.71
• .

• Oxytocin,8-(2-hydroxy-4-methylpentanoic acid)- (9CI)
• 75607-76-0
• C43H65 N11 O13 S2
• 0
• .

• Olsalazine
• 15722-48-2
• C₁₄H₁₀N₂O₆
• 302.24
• .

• Olean-12-en-28-oicacid,27-[[(2E)-3-(4-hydroxyphenyl)-1-oxo-2-propenyl]oxy]-3-[[(2Z)-3-(4-hydroxyphenyl)-1-oxo-2-propenyl]oxy]-,(3b)- (9CI)
• 152509-93-8
• C48H60 O8
• .

• Octadecanoic acid,2,2-bis(hydroxymethyl)butyl ester
• 60130-68-9
• C24H48 O4
• 262-072-1
• 402.61
• .

• Octanamine (9CI)
• 149698-79-3
• C8H19 N
• .

• Octanamide, N-hydroxy-
• 7377-03-9
• C8H17 N O2
• 230-936-7
• 159.23
• .

• Oxirane,2,2'-[(1-methylethylidene)bis[4,1-phenyleneoxy[1-(butoxymethyl)-2,1-ethanediyl]oxymethylene]]bis-
• 71033-08-4
• C35H52 O8
• 275-143-7
• 600.78258
• .

• Obtusin
• 70588-05-5
• C₁₈H₁₆O₇
• 344.31
• .

• Octadecanoic acid,2-bromo-
• 17108-71-3
• C18H35 Br O2
• 363.37
• .

• oxygen(-2) anion; rubidium(+1) cation; titanium(+4) cation
• 12137-34-7
• O₃Rb₂Ti
• 235-238-6
• 266.8
• .

• Octadecanoic acid,phenyl-
• 26854-48-8
• C24H40 O2
• 248-059-3
• 360.5732
• .

• Oxacycloundeca-4,9-dien-2-one,5,9-dimethyl-, (4E,9E)-
• 111351-08-7
• C12H18 O2
• .

• Olean-12-ene-15,16,21,22,28-pentol,3-[(O-a-L-arabinopyranosyl-(1®6)-O-[b-D-glucopyranosyl-(1®2)]-b-D-glucopyranosyl)oxy]-, 28-acetate 21-[(2E)-2-methyl-2-butenoate], (3b,15a,16a,21b,22a)- (9CI)
• 159158-27-7
• C54H86 O22
• .

• Oxygenase, arachidonate8-lip-
• 100900-72-9
• .

• Oxirane,2,2'-(1,6-hexanediyl)bis-
• 24854-67-9
• C10H18 O2
• 246-498-5
• 170.28
• .

• Olean-12-en-28-oicacid, 3,16-dihydroxy-23-oxo-, (3b,4a,16a)-
• 631-01-6
• C30H46 O5
• 211-149-8
• 486.68324
• .

• Octadecanoic acid,1,1'-(1,2-ethanediyl) ester, mixt. with N-(hydroxyethyl) coco amides and a-sulfo-w-(dodecyloxy)poly(oxy-1,2-ethanediyl)sodium salt (1:1)
• 141489-42-1
• C38H74 O4 . (C2 H4 O)n C12 H26 O4 S . Na .
• .

• Oxirane,2-(1,1-dimethylethyl)-3-(trimethylsilyl)-, (2R,3R)-rel-
• 114693-78-6
• C9H20 O Si
• 0
• .

• Oxirane,2-(4-nitrophenyl)-3-propyl-, trans- (9CI)
• 118584-57-9
• C11H13 N O3
• 0
• .

• Oxacyclooctadeca-8,16-diene-2-undecanoicacid, 10,12,14-trihydroxy-k,3,7,9,13,17-hexamethyl-18-oxo-, (kR,2R,3S,7S,8E,10S,12R,13R,14R,16E)-
• 164177-51-9
• C34H60 O7
• .

• Oxacyclododecan-2-one
• 1725-03-7
• C₁₁H₂₀O₂
• 217-034-9
• 184.2753
• .

• Octanoic acid,lanthanum(3+) salt (3:1)
• 60903-69-7
• C8H16 O2 . 1/3 La
• 262-522-7
• 568.516
• .

• Octadecanoic acid,3-[2-(ethylamino)-1-hydroxyethyl]phenyl ester
• 75011-64-2
• C28H49 N O3
• 0
• .

• Oxireno[8,9]cyclodeca[1,2-b]furan-8(2H)-one,6-(acetyloxy)-1a,3,6,6a,7,9a,10,10a-octahydro-4,10a-dimethyl-7-methylene-,(1aR,4E,6R,6aR,9aS,10aR)-
• 28272-18-6
• C17H22 O5
• 306.3536
• .

• Olean-12-en-28-oicacid, 3,21,22-trihydroxy-, (3b,21b,22a)- (9CI)
• 29038-42-4
• C30H48 O5
• 0
• .

• Oxacyclotetradeca-3,6,9-trien-2-one,5-hydroxy-8-methoxy-5,9,13,14-tetramethyl-, (3E,5R,6E,8S,9E,13S,14R)-
• 25129-91-3
• C18H28 O4
• 308.415
• .

• Octadecanoic acid,decyl ester
• 32509-55-0
• C28H56 O2
• 251-072-7
• 424.74
• .

• Oxayohimban-16-carboxylicacid, 16,17-didehydro-9-methoxy-19-methyl-, methyl ester, (3b,19a)-
• 13062-04-9
• C22H26 N2 O4
• .

• Octadecanamide,N-[2-(2-heptadecyl-4,5-dihydro-1H-imidazol-1-yl)ethyl]-
• 26272-76-4
• C40H79 N3 O
• 247-577-7
• 618.07476
• .

• Olean-12-en-28-oicacid, 3-[(O-b-D-glucopyranosyl-(1®3)-O-a-L-arabinopyranosyl-(1®2)-O-a-L-arabinopyranosyl-(1®2)-a-L-arabinopyranosyl)oxy]-16-hydroxy-,(3b,16a)- (9CI)
• 25480-74-4
• C51H82 O21
• 0
• .

• Oxiraneundecanoic acid,k-hydroxy-3-isocyano-3-methyl-, (kR,2R,3R)-rel-(-)- (9CI)
• 113701-99-8
• C15H25 N O4
• 0
• .

• Oxiracetam
• 62613-82-5
• C₆H₁₀N₂O₃
• 158.1552 [g/mol]
• .

• Oxirane, 2-(1-pyrenyl)-
• 61695-74-7
• C18H12 O
• 244.30
• .

• Osmium, isotope of mass191
• 14119-24-5
• Os
• 190.9609
• .

• Oxacyclooctadeca-3,5,9,13,15-pentaen-2-one,3-[[[6-deoxy-4-O-(3,5-dichloro-2-ethyl-4,6-dihydroxybenzoyl)-2-O-methyl-b-L-mannopyranosyl]oxy]methyl]-12-[[6-deoxy-5-C-methyl-2-O-(2-methyl-1-oxopropyl)-b-D-lyxo-hexopyranosyl]oxy]-11-ethyl-8-hydroxy-18-(1-hydroxyethyl)-9,13,15-trimethyl-
• 106008-70-2
• C52H74 Cl2 O18
• 1058.0392
• .

• Octanoic acid, tin(2+)salt (2:1)
• 1912-83-0
• C8H16 O2 . 1/2 Sn
• 217-624-6
• 405.117
• .

• Orphol (9CI)
• 8039-60-9
• C₂₀H₃₅ClO₄S
• 0
• .