| 1 | ARGININE | ARG |
 |
25 |
| 2 | amino({3-[(3S,8aS)-1,4-dioxooctahydropyrrolo[1,2-a]pyrazin-3-yl]propyl}amino)methaniminium | 0HZ |
 |
3 |
| 3 | Alpha-Lobeline | L0B |
 |
9 |
| 4 | ALPHA-DIFLUOROMETHYLORNITHINE | DMO |
 |
1 |
| 5 | Alpha-Bromo-3-Iodotoluene | 8Z5 |
 |
1 |
| 6 | ALLYL-{6-[3-(4-BROMO-PHENYL)-BENZOFURAN-6-YLOXY]-HEXYL-}-METHYL-AMIN | R19 |
 |
1 |
| 7 | ALLYL-{6-[3-(4-BROMO-PHENYL)-1-METHYL-1H-INDAZOL-6-YL]OXY}HEXYL)-N-METHYLAMINE | R03 |
 |
1 |
| 8 | ALLYL-{4-[3-(4-BROMO-PHENYL)-BENZOFURAN-6-YLOXY]-BUT-2-ENYL}-METHYL-AMINE | R17 |
 |
1 |
| 9 | ADP-ribosyl-L-arginine | F2R |
 |
1 |
| 10 | ADENOSINE MONOPHOSPHATE | AMP |
 |
9 |
| 11 | Adenosine Diphosphate (Hydroxymethyl)pyrrolidine monoalcohol | A3R |
 |
1 |
| 12 | ADENOSINE -5'-THIO-MONOPHOSPHATE | SRA |
 |
1 |
| 13 | ADENOSINE-5'-PENTAPHOSPHATE | 5FA |
 |
3 |
| 14 | ADENOSINE-5-DIPHOSPHORIBOSE | APR |
 |
1 |
| 15 | ADENOSINE-2'-MONOPHOSPHATE | 2AM |
 |
1 |
| 16 | ADENOSINE | ADN |
 |
4 |
| 17 | ADENINE | ADE |
 |
1 |
| 18 | ACETYLTHIOCHOLINE | AT3 |
 |
2 |
| 19 | ACETYLCHOLINE | ACH |
 |
5 |