Supplier Page from Thermo Fisher Scientific for (-)-Diethyl D-tartrate, 99%, made from unnatural tartaric acid
2,6-Lutidine, 99% from Thermo Fisher Scientific
D-Mannitol, 98+% from Thermo Fisher Scientific
Norcamphor, 99% from Thermo Fisher Scientific
Oxytetracycline dihydrate, 95% from Thermo Fisher Scientific