Supplier Page from Thermo Fisher Scientific for Nitronium tetrafluoroborate, 0.3 to 0.5M soln. in sulfolane
1-Ethynyl-1-cyclohexanol, 99+% from Thermo Fisher Scientific
9-Fluorenone, 99+% from Thermo Fisher Scientific
Ethyl 4-bromocrotonate, 75%, tech from Thermo Fisher Scientific
Ethyl acetoacetate, 99%, pure from Thermo Fisher Scientific