Supplier Page from Thermo Fisher Scientific for Guanosine 5'-triphosphate, disodium salt hydrate, 90%, for biochemistry
D-Mannitol, 98+% from Thermo Fisher Scientific
Ethylene carbonate, 99+% from Thermo Fisher Scientific
Isonipecotic acid, 99% from Thermo Fisher Scientific
L-Serine methyl ester hydrochloride, 98% from Thermo Fisher Scientific