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Fentanyl citrate

2-Hydroxy-4-methylpyridine

3-Amino-6-bromo-2-methoxypyridine

Methyl 5-bromo-2-methylbenzoate

N-Boc-2,6-diethyl-4-oxo-piperdine

2-Chloro-1,3-dimethylimidazolidinium hexafluorophosphate

S-(1-Oxo-2-pyridyl)thio-1,3-dimethylpropyleneuronium hexafluorophosphate

O-Succinimidyl-1,3-dimethylpropyleneuronium hexafluorophosphate