| 51 | 5-methyl-6-phenyl-2-piperidin-4-yl-pyridazin-3-one | EHE |
 |
1 |
| 52 | 5-methyl-7-oxo-6-(propan-2-yl)-4,7-dihydropyrazolo[1,5-a]pyrimidine-3-carbonitrile | 6E8 |
 |
1 |
| 53 | 5-methylphenazin-1(5H)-one | 3J8 |
 |
1 |
| 54 | 5'-O-(L-alpha-aspartylsulfamoyl)adenosine | DSZ |
 |
1 |
| 55 | 5'-O-[(R)-hydroxy{[(R)-hydroxy{[(S)-hydroxy(phosphonooxy)phosphoryl]oxy}phosphoryl]oxy}phosphoryl]-7-methylguanosine | 6G0 |
 |
1 |
| 56 | 5'-O-[(R)-hydroxy{[(S)-hydroxy(phosphonoamino)phosphoryl]oxy}phosphoryl]uridine | UNP |
 |
1 |
| 57 | 5'-O-[(R)-[(N-acetyl-L-alpha-aspartyl)amino](3-aminopropoxy)phosphoryl]adenosine | 7MC |
 |
1 |
| 58 | 5'-O-[(S)-({5-[(2R,3aS,4S,6aR)-2-hydroxyhexahydro-1H-thieno[3,4-d]imidazol-4-yl]pentanoyl}oxy){[(S)-hydroxy(phosphonooxy)phosphoryl]oxy}phosphoryl]adenosine | F5D |
 |
1 |
| 59 | 5'-O-[(S)-{[(S)-{[(2R,3R,4S)-3,4-DIHYDROXYPYRROLIDIN-2-YL]METHOXY}(HYDROXY)PHOSPHORYL]OXY}(HYDROXY)PHOSPHORYL]ADENOSINE | A1R |
 |
1 |
| 60 | 5-propyl[1,2,4]triazolo[1,5-c]quinazolin-2-amine | H05 |
 |
1 |