Supplier Page from Thermo Fisher Scientific for Polyethyleneimine, branched, M.W. 50,000 - 100,000, 30% w/w aq. soln
1-Ethylpiperidine, 99% from Thermo Fisher Scientific
9-Fluorenone, 99+% from Thermo Fisher Scientific
Ethyl butyrylacetate, 98% from Thermo Fisher Scientific
Ethyl trifluoroacetate, 99% from Thermo Fisher Scientific