| Similarity | Rank | |
|---|---|---|
| nitrate | 0.922 | 24975 |
| Nitrates | 0.911 | 98584 |
| nitrite | 0.884 | 58090 |
| nitrites | 0.880 | 89499 |
| nitroglycerin | 0.819 | 57416 |
| isosorbide | 0.807 | 85080 |
| nitric | 0.805 | 25998 |
| Nitrate | 0.793 | 90091 |
| citrate | 0.789 | 18873 |
| L-arginine | 0.778 | 67070 |
| PDE5 | 0.773 | 36875 |
| PDE-5 | 0.772 | 59128 |
| priapism | 0.764 | 70559 |
| vasodilator | 0.762 | 91177 |
| amines | 0.757 | 79289 |
| potassium | 0.757 | 13817 |
| hydrochloric | 0.756 | 58217 |
| Revatio | 0.753 | 93669 |
| oxalate | 0.753 | 68869 |
| beta-blockers | 0.753 | 84240 |
| phosphates | 0.752 | 65870 |
| vardenafil | 0.751 | 24395 |
| phosphodiesterase | 0.749 | 53286 |
| phosphorus | 0.749 | 23230 |
| Sildenafil | 0.749 | 23972 |