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 |
| Y | 2'-DEOXY-N6-(S)STYRENE OXIDE ADENOSINE MONOPHOSPHATE |
| Y1 | YTTRIUM ION |
| Y12 | 4-{(1E)-3-OXO-3-[(2-PHENYLETHYL)AMINO]PROP-1-EN-1-YL}-1,2-PHENYLENE DIACETATE |
| Y13 | (2E)-3-(3,4-DIHYDROXYPHENYL)-N-[2-(4-HYDROXYPHENYL)ETHYL]ACRYLAMIDE |
| Y27 | (R)-TRANS-4-(1-AMINOETHYL)-N-(4-PYRIDYL) CYCLOHEXANECARBOXAMIDE |
| Y3 | 4-ACETYLAMINO-5-HYDROXYNAPHTHALENE-2,7-DISULFONIC ACID |
| YB | YTTERBIUM (III) ION |
| YBH | 4-OXO-3-{6-[4-(QUINOXALIN-2-YLOXY)-BENZOYLAMINO]-2-THIOPHEN-2-YL-HEXANOYLAMINO}-BUTYRIC ACID |
| YBT | BIS-(2-HYDROXYETHYL)AMINO-TRIS(HYDROXYMETHYL)METHANE YTTRIUM |
| YCM | S-(2-AMINO-2-OXOETHYL)-L-CYSTEINE |
| YF1 | 2,5-DIMETHYLPYRIMIDIN-4-AMINE |
| YF3 | 2-{[(4-AMINO-2-METHYLPYRIMIDIN-5-YL)METHYL]AMINO}PROPANE-1-THIOL |
| YF4 | 5-{[ETHYL(METHYL)AMINO]METHYL}-2-METHYL-5,6-DIHYDROPYRIMIDIN-4-AMINE |
| YG | WYBUTOSINE |
| YMA | 7,10,13-TRI(CARBOXYMETHYL)-5,15-DIOXO-4,7,10,13,16-PENTAAZA-1,19-DITHIANONADECANE |
| YML | [(3R,4S,5S,7R)-4,8-DIHYDROXY-3,5,7-TRIMETHYL-2-OXOOCTYL]PHOSPHONIC ACID |
| YOF | 3-FLUOROTYROSINE |
| YOK | [[2,2'-[4-CARBOXYETHYL-1,2-PHENYLENEBIS(NITRILOMETHYLIDYNE)]BIS[PHENOLATO]](2-)-N,N',O,O']-IRON |
| YOL | [[2,2'-[4-CARBOXY-1,2-PHENYLENEBIS(NITRILOMETHYLIDYNE)]BIS[PHENOLATO]](2-)-N,N',O,O']-IRON |
| YOM | 2,2'-[1,2-PHENYLENEBIS(NITRILOMETHYLIDYNE)]BIS[PHENOLATO]](2-)-N,N',O,O']-IRON |
| YPA | (S)-3-(4-(2-CARBAZOL-9-YL-ETHOXY)-PHENYL)-2-ETHOXY-PROPIONIC ACID |
| YRR | 3-HYDROXY-PYRROLIDIN-2-YLMETHYL-MONOPHOSPHATE GROUP |
| YSA | 5'-O-[N-(L-TYROSYL)SULFAMOYL]ADENOSINE |
| YSH | 1-[3-CYANO-4-(NEOPENTYLOXY)PHENYL]-1H-PYRAZOLE-4-CARBOXYLIC ACID |
| YT3 | YTTRIUM (III) ION |
| YVN | N-({(1R,2R,3S)-2-[(METHYLAMINO)CARBONYL]-3-[4-(PHOSPHONOOXY)PHENYL]CYCLOPROPYL}CARBONYL)-L-VALYL-L-ASPARTAMIDE |
| YYG | 4-(3-[5-O-PHOSPHONORIBOFURANOSYL]-4,6-DIMETHYL-8-OXO-4,8-DIHYDRO-3H-1,3,4,5,7A-PENTAAZA-S-INDACEN-YLAMINO-BUTYRIC ACID METHYL ESTER |
| YZ9 | 7-HYDROXY-2-OXO-CHROMENE-3-CARBOXYLIC ACID ETHYL ESTER |