Supplier Page from Thermo Fisher Scientific for Indigo carmine
D(-)-Ribose, 99+% from Thermo Fisher Scientific
D(+)-Melibiose monohydrate, 99+% from Thermo Fisher Scientific
DL-Menthol, 99% from Thermo Fisher Scientific
L-Serine methyl ester hydrochloride, 98% from Thermo Fisher Scientific