• Orymycin (9CI)
• 103000-46-0
• .

• Oxazolo[5,4-d]pyrimidine-5,7(4H,6H)-dione,2-(4-chlorophenyl)-4,6-dimethyl-
• 63873-75-6
• C13H10 Cl N3 O3
• 291.6898
• .

• Ornithine,hydrochloride (1:?)
• 22834-83-9
• C5H12 N2 O2 . x Cl H
• 245-259-2
• 337.2438
• .

• Oxirane,2,2'-[(1-methyl-1,3-propanediyl)bis(oxymethylene)]bis-
• 3332-48-7
• C10H18 O4
• 222-061-4
• 202.24752
• .

• Olean-12-en-3-one,16,21,22,28-tetrahydroxy-, (16a,21b,22a)- (9CI)
• 64285-74-1
• C30H48 O5
• 0
• .

• Octadecanamide,N,N'-[1-[[[3-(dimethylamino)propyl]amino]carbonyl]-1,5-pentanediyl]bis- (9CI)
• 73067-77-3
• C47H94 N4 O3
• 277-268-2
• 763.27426
• .

• Olean-12-en-28-oicacid, 2,16,23-trihydroxy-3-[(3-O-b-D-xylopyranosyl-b-D-glucopyranosyl)oxy]-, O-6-deoxy-a-L-mannopyranosyl-(1®3)-O-b-D-xylopyranosyl-(1®4)-O-6-deoxy-a-L-mannopyranosyl-(1®2)-6-deoxy-3-O-[3-[3-(3-hydroxy-1-oxobutoxy)-1-oxobutoxy]-1-oxobutyl]-b-D-galactopyranosyl ester, (2b,3b,4a,16a)- (9CI)
• 156250-51-0
• C76H122 O37
• .

• Osmium, bis[(1,2,3,4,5-h)-2,4-dimethyl-2,4-pentadienyl]-(9CI)
• 113530-61-3
• C14H22 Os
• 0
• .

• Oxazole,5-ethyl-4-methyl-
• 29584-92-7
• C6H9 N O
• 111.1418
• .

• Olean-12-en-28-oicacid, 3-[(O-b-D-glucopyranosyl-(1®3)-O-6-deoxy-a-L-mannopyranosyl-(1®2)-a-L-arabinopyranosyl)oxy]-23-hydroxy-, 6-O-b-D-glucopyranosyl-b-D-glucopyranosyl ester, (3b,4a)-
• 140360-29-8
• C59H96 O27
• 0
• .

• Octanamide,N-(3-aminopropyl)-
• 73772-41-5
• C11H24 N2 O
• 277-595-0
• 200.32106
• .

• Olean-12-en-29-oicacid, 1-hydroxy-3-oxo-, (1a,20b)- (9CI)
• 159359-64-5
• C30H46 O4
• 0
• .

• Octadecanoic acid,12-hydroxy-, lithium salt (1:1)
• 7620-77-1
• C18H36 O3 . Li
• 231-536-5
• 306.41
• .

• Olean-12-ene-23,28-dioicacid, 2,3,16,21-tetrahydroxy-, (2b,3b,4b,16b,21b)-
• 26121-80-2
• C30H46 O8
• 0
• .

• Oxirane,2,3-diethenyl-, (2R,3S)-rel-
• 13051-60-0
• C6H8 O
• 235-931-3
• 96.12712
• .

• Octanoic acid,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-pentadecafluoro-, potassium salt (1:1)
• 2395-00-8
• C8H F15 O2 . K
• 219-248-8
• 452.158748
• .

• Octane,2-isothiocyanato-, (-)-
• 69626-80-8
• C9H17 N S
• 171.3
• .

• Octadecanoic acid,2-[[2-[(1-oxooctadecyl)amino]ethyl]amino]ethyl ester
• 68900-94-7
• C40H80 N2 O3
• 272-643-7
• 637.0748
• .

• Olivine-group minerals
• 1317-71-1
• H₄O₄Si·xFe·xMg
• 215-281-7
• 320.98972
• .

• Octanoic acid,(2S,2aR,3R,5aR,6R,9S,9aS,9bS,10R,12R)-decahydro-12-hydroperoxy-3-hydroxy-3,6,9-trimethyl-13-methylene-7-oxo-2,9-pentano-2H-furo[2,3,4-ef][3]benzoxepin-10-ylester, rel-(-)-
• 165198-59-4
• C28H44 O8
• .

• Octadecane,1-[bis(octadecyloxy)methoxy]-
• 17671-28-2
• C55H112 O3
• 241-647-0
• 821.48
• .

• Oxazolidine, 4-ethyl-
• 53019-53-7
• C5H11 N O
• 258-299-0
• 101.14694
• .

• Octadecanoic acid,17-methyl-
• 2724-59-6
• C₁₉H₃₈O₂
• 298.5
• .

• Oils, catnip
• 8023-84-5
• 0
• .

• Olean-13(18)-en-3-one,28-hydroxy- (9CI)
• 165905-22-6
• C30H48 O2
• .

• Octadecanoic acid,2-sulfo-, 1-(1-methylethyl) ester, sodium salt (1:1)
• 3076-25-3
• C21H42 O5 S . Na
• 221-353-9
• 428.60201
• .

• Oxirane,2-[[3-[(3-chloropropyl)dimethoxysilyl]propoxy]methyl]-
• 71808-64-5
• C11H23 Cl O4 Si
• 0
• .

• Ornithine,2-(fluoromethyl)-
• 73800-85-8
• C6H13 F N2 O2
• 164.1780232
• .

• o-Tolualdehyde,1,4-phthalazinediyldihydrazone (8CI)
• 27702-32-5
• C24H22 N6
• 394.4717
• .

• Octadecanoic acid,C11-14-isoalkyl esters, C13-rich
• 120525-96-4
• C₃₁H₆₂O₂
• 0
• .

• Oxacyclopentadeca-8,12-dien-2-one,10,14-dihydroxy-4,11-dimethyl-5-methylene-15-[(1R,2E)-1-methyl-2-hexen-1-yl]-,(4R,8E,10S,11R,12E,14R,15R)-
• 147714-56-5
• C24H38 O4
• .

• Olean-12-en-28-oicacid, 3-[(2-O-a-L-arabinopyranosyl-b-D-glucopyranosyl)oxy]-2,23-dihydroxy-,(2b,3b,4a)- (9CI)
• 106256-46-6
• C41H66 O14
• .

• Oxirane, 2-(4-pyrenyl)-
• 73529-24-5
• C18H12 O
• 244.30
• .

• Oxirane,methyl-,polymerwithoxirane,monooctadecanoate
• 37231-60-0
• C₂₃H₄₅O₄
• 0
• .

• Olean-12-ene-28,29-dioicacid, 3-[(3-O-acetyl-a-L-arabinopyranosyl)oxy]-, (3b,20a)- (9CI)
• 135248-38-3
• C37H56 O10
• 0
• .

• Oils, tangelo
• 72869-73-9
• 0
• .

• Octadecanoic acid,2-naphthalenyl ester
• 6343-74-4
• C28H42 O2
• 228-742-2
• 410.63
• .

• Oxazole,4-(4-bromophenyl)-2-methyl-5-nitro-
• 78164-40-6
• C10H7 Br N2 O3
• 0
• .

• Oxygenase, cytidinemonophosphoacetylneuraminate mono-
• 116036-67-0
• .

• Olean-12-en-23,28-dioicacid, 2b,3b,27-trihydroxy-, dimethyl ester (8CI)
• 2735-82-2
• C32H50 O7
• 546.7352
• .

• Olean-12-en-28-oicacid, 3-[(O-D-glucopyranosyl-(1®4)-O-D-glucopyranosyl-(1®4)-O-D-xylopyranosyl-(1®2)-O-L-arabinopyranosyl-(1®2)-O-L-arabinopyranosyl-(1®4)-6-deoxy-L-mannopyranosyl)oxy]-, (3b)- (9CI)
• 23344-45-8
• C63H102 O29
• .

• Octanoic acid, 3-oxo-
• 13283-91-5
• C8H14 O3
• 0
• .

• Octadecanoic acid,[6,7-dihydro-4-methyl-7-(1-methylethenyl)-1-azulenyl]methyl ester
• 52898-98-3
• C33H52 O2
• 0
• .

• Olean-12-ene-23,28-dioicacid, 3-(b-D-glucopyranosyloxy)-2-hydroxy-,28-(O-b-D-xylopyranosyl-(1®4)-O-6-deoxy-a-L-mannopyranosyl-(1®2)-b-L-arabinopyranosyl) ester, (2b,3b,4a)- (9CI)
• 107195-79-9
• C52H82 O23
• .

• Oleana-9(11),12-dien-28-oicacid, 3,21-dioxo- (9CI)
• 64854-67-7
• C30H42 O4
• 0
• .

• Olean-12-en-28-oicacid, 3-[[2-O-[6-O-(4-carboxy-3-hydroxy-3-methyl-1-oxobutyl)-b-D-glucopyranosyl]-b-D-glucopyranosyl]oxy]-2,23-dihydroxy-,28-[2-O-(6-deoxy-a-L-mannopyranosyl)-a-L-arabinopyranosyl] ester,intramol. 6''(3)®4''(28)-ester,(2b,3b,4a)-
• 123714-90-9
• C59H92 O26
• .

• Octadecanoic acid,1-methylnonyl ester
• 55194-65-5
• C28H56 O2
• 259-521-9
• 424.74304
• .

• Ozone mixed with sulfur dioxide (1:1)
• 37341-22-3
• O₅S
• 0
• .

• Olean-12-en-28-oicacid, 3-[(3-O-b-D-glucopyranosyl-b-D-xylopyranosyl)oxy]-23-hydroxy-,b-D-glucopyranosyl ester, (3b,4a)- (9CI)
• 169397-84-6
• C47H76 O18
• .

• Octapeptin, N-glycylderiv. (9CI)
• 102647-47-2
• .