0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
| X | 2'-DEOXY-N7-(8,9-DIHYDRO-9-HYDROXY-10-DEHYDROXY-AFLATOXIN)GUANOSINE MONOPHOSPHATE |
| X04 | (2-AMINO-4-FORMYL-5-HYDROXY-6-METHYLPYRIDIN-3-YL)METHYL DIHYDROGEN PHOSPHATE |
| X1P | 1-O-PHOSPHONO-ALPHA-D-XYLOPYRANOSE |
| X2F | 2-DEOXY-2-FLUORO XYLOPYRANOSE |
| X41 | 1-MYRISTOYL-2-MYRISTOLEOYL-SN-GLYCERO-3-PHOSPHATE |
| X7O | 5-AMINO-3-METHYL-PYRROLIDINE-2-CARBOXYLIC ACID |
| X81 | 1-STEAROYL-2-OLEOYL-SN-GLYCERO-3-PHOSPHATE |
| XAA | (1S,2S)-1-AMINO-1-(1,3-THIAZOL-2-YL)PROPAN-2-OL |
| XAD | 9-(2,3-DIDEOXY-6-O-PHOSPHONO-BETA-D-ERYTHRO-HEXOPYRANOSYL)-9H-PURIN-6-AMINE |
| XAE | 3-(2-DEOXY-5-O-PHOSPHONO-BETA-D-ERYTHRO-PENTOFURANOSYL)-3H-IMIDAZO[4,5-G]QUINAZOLIN-8-AMINE |
| XAN | XANTHINE |
| XAO | CYCLOHEXYLMETHYL-2,3-DIHYDROXY-5-METHYL-HEXYLAMIDE |
| XAT | (3S,5R,6S,3'S,5'R,6'S)-5,6,5',6'-DIEPOXY-5,6,5',6'- TETRAHYDRO-BETA,BETA-CAROTENE-3,3'-DIOL |
| XBB | (3S)-2,3,4,5-TETRAHYDROPYRIDIN-3-AMINE |
| XBP | XYLULOSE-1,5-BISPHOSPHATE |
| XC2 | (3R)-8-CYCLOPROPYL-6-(MORPHOLIN-4-YLMETHYL)-7-(1-NAPHTHYLMETHYL)-5-OXO-2,3-DIHYDRO-5H-[1,3]THIAZOLO[3,2-A]PYRIDINE-3-CARBOXYLIC ACID |
| XCC | FE(4)-NI(1)-S(4) CLUSTER |
| XCS | (1R)-1-(4-AMINO-6-METHYL-2-OXO-1,2-DIHYDROQUINAZOLIN-8-YL)-1,4-ANHYDRO-2-DEOXY-5-O-PHOSPHONO-D-ERYTHRO-PENTITOL |
| XCT | 4-AMINO-1-(2,3-DIDEOXY-6-O-PHOSPHONO-BETA-D-ERYTHRO-HEXOPYRANOSYL)PYRIMIDIN-2(1H)-ONE |
| XCY | {5-[4-{[4-(AMINOMETHYL)BENZYL]AMINO}-2-OXOPYRIMIDIN-1(2H)- YL]-3-HYDROXYTETRAHYDROFURAN-2-YL}METHYL DIHYDROGEN PHOSPHATE |
| XDL | XYLOSE-DERIVED ISOFAGOMINE LACTAM |
| XDN | PIPERIDINE-3,4,5-TRIOL |
| XDP | D-XYLULOSE-2,2-DIOL-1,5-BISPHOSPHATE |
| XE | XENON |
| XED | DEXTROFLOXACINE |
| XGA | 6-AMINO-3-(2-DEOXY-5-O-PHOSPHONO-BETA-D-ERYTHRO-PENTOFURANOSYL)-3,7-DIHYDRO-8H-IMIDAZO[4,5-G]QUINAZOLIN-8-ONE |
| XGU | 2-AMINO-9-(2,3-DIDEOXY-6-O-PHOSPHONO-BETA-D-ERYTHRO-HEXOPYRANOSYL)-1,9-DIHYDRO-6H-PURIN-6-ONE |
| XIF | PIPERIDINE-3,4-DIOL |
| XIH | 2-({8-[(3R)-3-AMINOPIPERIDIN-1-YL]-1,3-DIMETHYL-2,6-DIOXO-1,2,3,6-TETRAHYDRO-7H-PURIN-7-YL}METHYL)BENZONITRILE |
| XIL | 3-HYDROXY-4-(3,4,5-TRIHYDROXY-TETRAHYDRO-PYRAN-2-YLOXY)-PIPERIDIN-2-ONE |
| XIM | 5,6,7,8-TETRAHYDRO-IMIDAZO[1,2-A]PYRIDINE-6,7,8-TRIOL |
| XK2 | [4R-(4ALPHA,5ALPHA,6BETA,7BETA)]-HEXAHYDRO-5,6-DIHYDROXY-1,3-BIS[2-NAPHTHYL-METHYL]-4,7-BIS(PHENYLMETHYL)-2H-1,3-DIAZEPIN-2-ONE |
| XL1 | ETHANETHIOL |
| XLC | 3-CHLORO-N-[4-CHLORO-2-[[(4-CHLOROPHENYL)AMINO]CARBONYL]PHENYL]-4-[(4-METHYL-1-PIPERAZINYL)METHYL]-2-THIOPHENECARBOXAMIDE |
| XLD | 3-CHLORO-N-[4-CHLORO-2-[[(5-CHLORO-2-PYRIDINYL)AMINO]CARBONYL]-6-METHOXYPHENYL]-4-[[(4,5-DIHYDRO-2-OXAZOLYL)METHYLAMINO]METHYL]-2-THIOPHENECARBOXAMIDE |
| XLM | METHYL 3-O-BETA-D-XYLOPYRANOSYL-ALPHA-D-MANNOPYRANOSIDE |
| XLS | D-XYLOSE (LINEAR FORM) |
| XMA | (-)-7-[(6-CHLORO-2-NAPHTHALENYL)SULFONYL]TETRAHYDRO-8A-(METHOXYMETHYL)-1'-(4-PYRIDINYL)-SPIRO[5H-OXAZOLO[3,2-A]PYRAZINE-2(3H),4'-PIPERIDIN]-5-ONE |
| XMB | 4-[(2R)-3-[[(6-CHLORO-2-NAPHTHALENYL)SULFONYL]AMINO]-1-OXO-2-[[[1-(4-PYRIDINYL)-4-PIPERIDINYL]METHYL]AMINO]PROPYL]-THIOMORPHOLINE-1,1-DIOXIDE |
| XMC | 4-[[4-[(6-CHLORO-2-NAPHTHALENYL)SULFONYL]-6-OXO-1-[[1-(4-PYRIDINYL)-4-PIPERIDINYL]METHYL]-2-PIPERAZINYL]CARBONYL]MORPHOLINE |
| XMD | (2R)-4-[(6-CHLORO-2-NAPHTHALENYL)SULFONYL]-6-OXO-1-[[1-(4-PYRIDINYL)-4-PIPERIDINYL]METHYL]-2-PIPERAZINECARBOXYLIC ACID ETHYL ESTER |
| XME | 4-[(6-CHLORO-2-NAPHTHALENYL)SULFONYL]-1-[[4-HYDROXYIMINOMETHYL-1-(4-PYRIDINYL)-4-PIPERIDINYL]METHYL]PIPERAZINONE |
| XMF | 4-[(6-CHLORO-2-NAPHTHALENYL)SULFONYL]-1-[[4-HYDROXYMETHYL-1-(4-PYRIDINYL)-4-PIPERIDINYL]METHYL]PIPERAZINONE |
| XMG | 4-[(6-CHLORO-2-NAPHTHALENYL)SULFONYL]-1-[[1-(4-PYRIDINYL)-4-PIPERIDINYL] METHYL]-2-PIPERAZINECARBOXYLIC ACID |
| XMH | 4-[(6-CHLORO-2-NAPHTHALENYL)SULFONYL]-1-[[1-(4-PYRIDINYL)-4-PIPERIDINYL]METHYL]-2-PIPERAZINECARBOXYLIC ACID ETHYL ESTER |
| XMI | 4-[(6-CHLORO-2-NAPHTHALENYL)SULFONYL]-1-[[1-(4-PYRIDINYL)-4-PIPERIDINYL]METHYL]PIPERAZINONE |
| XMJ | 4-[[(1E)-2-(4-CHLOROPHENYL)ETHENYL]SULFONYL]-1-[[1-(4-PYRIDINYL)-4-PIPERIDINYL]METHYL]PIPERAZINONE |
| XMK | 1-[[(1E)-2-(4-CHLOROPHENYL)ETHENYL]SULFONYL]-4-[[1-(4-PYRIDINYL)-4-PIPERIDINYL]METHYL]PIPERAZINE |
| XMM | (2R,3S,4S,5S,6R)-2-(5-BROMO-4-CHLORO-1H-INDOL-3-YLOXY)-TETRAHYDRO-6-(HYDROXYMETHYL)-2H-PYRAN-3,4,5-TRIOL |
| XMP | XANTHOSINE-5'-MONOPHOSPHATE |
| XN1 | N-[2-HYDROXY-1-INDANYL]-5-[(2-TERTIARYBUTYLAMINOCARBONYL)-4(3-PYRIDYLMETHYL)PIPERAZINO]-4-HYDROXY-2-(1-PHENYLETHYL)-PENTANAMIDE |
| XN2 | N-[2-HYDROXY-1-INDANYL]-5-[(2-TERTIARYBUTYLAMINOCARBONYL)-4(BENZO[1,3]DIOXOL-5-YLMETHYL)-PIPERAZINO]-4-HYDROXY-2-(1-PHENYLETHYL)-PENTANAMIDE |
| XN3 | N-[2(R)-HYDROXY-1(S)-INDANYL]-5-[(2(S)-TERTIARY BUTYLAMINOCARBONYL)-4(BENZO[1,3]DIOXOL-5-YLMETHYL)-PIPERAZINO]-4(S)-HYDROXY-2(R)-PHENYLMETHYLPENTANAMIDE |
| XP4 | 1,2-DIMYRISTOYL-SN-GLYCERO-3-PHOSPHATE |
| XPA | 1,2-DIDECANOYL-SN-GLYCERO-3-PHOSPHATE |
| XPE | 3,6,9,12,15,18,21,24,27-NONAOXANONACOSANE-1,29-DIOL |
| XPX | (2R)-3-[(HYDROXY{[(2R,3R,5S,6R)-3,4,5-TRIHYDROXY-2,6-BIS(ALPHA-D-MANNOPYRANOSYLOXY)CYCLOHEXYL]OXY}PHOSPHORYL)OXY]PROPANE-1,2-DIYL DIHEXADECANOATE |
| XR2 | 1-METHYL-9-[12-(9-METHYLPHENAZIN-10-IUM-1-YL)-12-OXO-2,11-DIAZA-5,8-DIAZONIADODEC-1-ANOYL]PHENAZIN-10-IUM |
| XS2 | METHYL4,4II,4III,4IV-TETRATHIO-BETA-D-XYLOPENTOSIDE |
| XTG | 4-NITROPHENYL 6-THIO-6-S-ALPHA-D-XYLOPYRANOSYL-BETA-D-GLUCOPYRANOSIDE |
| XTH | 1-(2,3-DIDEOXY-6-O-PHOSPHONO-BETA-D-ERYTHRO-HEXOPYRANOSYL)-5-METHYLPYRIMIDINE-2,4(1H,3H)-DIONE |
| XTY | (1R)-1,4-ANHYDRO-2-DEOXY-1-(6-METHYL-2,4-DIOXO-1,2,3,4-TETRAHYDROQUINAZOLIN-8-YL)-5-O-PHOSPHONO-D-ERYTHRO-PENTITOL |
| XUG | 2'-SE-METHYL-2'-SELENOGUANOSINE 5'-(DIHYDROGEN PHOSPHATE) |
| XUL | D-XYLULOSE |
| XV6 | [4R-(4ALPHA,5ALPHA,6BETA,7BETA)]-3,3'-[[TETRAHYDRO-5,6-DIHYDROXY-2-OXO-4,7-BIS(PHENYLMETHYL)-1H-1,3-DIAZEPINE-1,3(2H)-DIYL] BIS(METHYLENE)]BIS[N-2-THIAZOLYLBENZAMIDE] |
| XX5 | (S,S)-2-{1-CARBOXY-2-[3-(3,5-DICHLORO-BENZYL)-3H-IMIDAZOL-4-YL]-ETHYLAMINO}-4-METHYL-PENTANOIC ACID |
| XXX | (2R,3S,4R,5R,6R)-6-((1R,2R,3S,4R,6S)-4,6-DIAMINO-2,3-DIHYDROXYCYCLOHEXYLOXY)-5-AMINO-2-(AMINOMETHYL)-TETRAHYDRO-2H-PYRAN-3,4-DIOL |
| XXY | 4-((1H-IMIDAZOL-4-YL)METHYL)-2-(1-AMINO-2-HYDROXYPROPYL)-1-(2-OXOETHYL)-1H-IMIDAZOL-5-OLATE |
| XY2 | N,N'-DIMETHYL-N-(ACETYL)-N'-(7-NITROBENZ-2-OXA-1,3-DIAZOL-4-YL)ETHYLENEDIAMINE |
| XYA | 2-(6-AMINO-OCTAHYDRO-PURIN-9-YL)-5-HYDROXYMETHYL-TETRAHYDRO-FURAN-3,4-DIOL |
| XYD | 2,5-DIMETHYLANILINE |
| XYF | 5(R)-5-FLUORO-BETA-D-XYLOPYRANOSYL-ENZYME INTERMEDIATE |
| XYH | XYLAROHYDROXAMATE |
| XYL | D-XYLITOL |
| XYP | BETA-D-XYLOPYRANOSE |
| XYS | XYLOPYRANOSE |
| XYZ | BETA-D-XYLOFURANOSE |