Supplier Page from Thermo Fisher Scientific for 2,3-O-Isopropylidene-D-ribonic acid-1,4-lactone, 97+%
4-Fluoroaniline, 98% from Thermo Fisher Scientific
9-Fluorenone, 99+% from Thermo Fisher Scientific
Ethyl oxamate, 99% from Thermo Fisher Scientific
Fluorescein, pure from Thermo Fisher Scientific